fig1 a and 1b are schematic views of an example of a positionable element 104 that is repositionable within a longitudinally - elongated proximal reamer 102 at a plurality of discrete , specified longitudinal locations 108 a - d along the proximal reamer 102 . in the configuration shown in fig1 a and 1b , the positionable element 104 is positioned at longitudinal location 108 c . a distal end of the proximal reamer 102 can define a distal opening into an interior of the proximal reamer 102 . the positionable element 104 can be positioned longitudinally within the proximal reamer 102 . a distal end of the positionable element 104 can be configured to abut a distal reamer 106 insertable into the distal opening , thereby limiting longitudinal motion of the proximal reamer 102 in the distal direction , with respect to the distal reamer 106 , but not in the proximal direction , with respect to the distal reamer 106 . distal reamers are surgical instruments that are well - known to one of ordinary skill in the art . the positionable element 104 can be locked to the proximal reamer 102 at each of the plurality of discrete , specified longitudinal locations 108 a - d along the proximal reamer 102 . in some examples , the positionable element 104 can be unlocked from the proximal reamer 102 , can be repositioned longitudinally within the proximal reamer 102 to another of the discrete , specified longitudinal locations 108 a - d , and can be locked once again to the proximal reamer 102 . fig2 - 10 show various configurations of the proximal reamer and positionable element , as well as various examples of the mechanisms with which they can be locked to each other and unlocked from each other . in some examples , such as the examples of fig2 - 5 , the positionable element is a stop element . in some examples , such as the examples of fig6 - 10 , the positionable element is a driver . other suitable proximal reamers , positionable elements , and configurations can also be used . fig2 is a side view of an example of a longitudinally - elongated proximal reamer 200 . the configuration of fig2 is but one example ; other suitable proximal reamers can also be used . a distal end 202 of the proximal reamer 200 can define a distal opening 204 into an interior of the proximal reamer 200 . the distal end 202 of the proximal reamer 200 can include at least one cutting flute 206 surrounding the distal opening 204 . the cutting flute 206 can include one or more helical blades on its exterior surface . the blade or blades can have a shape and geometry that can vary with the particular surgical application . the proximal reamer 200 can further define a first longitudinal slot 208 formed in an outer surface 218 of the reamer . in some examples , the first longitudinal slot 208 can extend fully along the longitudinal extent of the proximal reamer 200 . in other examples , the first longitudinal slot 208 can terminate proximal of the distal end 202 of the proximal reamer , and / or can terminate distal of a proximal end 212 of the proximal reamer 200 . the proximal reamer 200 can further define a first plurality of enlarged aperture regions 210 disposed along the first longitudinal slot 208 . in some examples , the enlarged aperture regions 210 can be circular ; in other examples , other suitable shapes can be used . in some examples , an enlarged aperture region 210 can be disposed at one longitudinal end of the first longitudinal slot 208 . in some examples , two enlarged aperture regions 210 are disposed at opposite longitudinal ends of the first longitudinal slot 208 . in some examples , the proximal reamer 200 can include first and second longitudinal slots formed on opposite sides of the proximal reamer 200 . in these examples , the proximal reamer 200 can further define first and second pluralities of enlarged aperture regions along the first and second longitudinal slots , respectively . in these examples , each enlarged aperture region in the first plurality can be positioned at the same location as a corresponding enlarged aperture region in the second plurality . in other examples , the proximal reamer can include more than two longitudinal slots , located circumferentially around the proximal reamer . in these examples , the enlarged aperture regions can be positioned at the same longitudinal locations along the longitudinal slots . the proximal reamer 200 can further include a reamer quick - connection 214 positioned on the proximal end 212 of the proximal reamer 200 . the quick - connection 214 can be a hudson style , or any other suitable configuration . the proximal reamer 200 can further include indicia 216 . the indicia can include one or more of colored markings , colored bands , letters , and numbers , all of which can provide a visual indication of a particular configuration of proximal reamer 200 and / or a particular longitudinal location along the proximal reamer 200 . fig3 is a side view of an example of a stop element 300 . during use , the stop element 300 can be disposed within the interior of the proximal reamer . the stop element 300 can be switchable between an unlocked state , in which the stop element 300 is longitudinally positionable with respect to the proximal reamer ( for example , proximal reamer 200 of fig2 ), and a locked state , in which the stop element 300 is locked to or engages the proximal reamer ( 200 ; fig2 ) at one of a plurality of discrete , specified longitudinal locations along the proximal reamer ( 200 ; fig2 ). the configuration of fig3 is but one example ; other suitable stop elements can also be used . a distal end 302 of the stop element 300 can be configured to contact a proximal end of a distal reamer insertable into the distal opening of the proximal reamer ( for example , distal reamer 106 of fig1 ). in some examples , the distal end 302 can be flat and perpendicular to a longitudinal axis of the proximal reamer 200 . in some examples , the distal end 302 can be convex . in some examples , the distal end 302 can be rotationally symmetric with respect to the longitudinal axis of the proximal reamer 200 . for these examples , the stop element 300 can be rotationally decoupled from the distal reamer . in other examples , the distal end 302 can include one or more features that can rotationally couple the stop element 300 to the distal reamer . the stop element 300 can include a first prong 304 biased to extend radially outward from within the proximal reamer . a first portion 306 of the first prong 304 can be sized larger than a circumferential diameter of the first longitudinal slot ( 208 ; fig2 ) and smaller than the enlarged aperture regions ( 210 ; fig2 ) in the first plurality . when the stop element 300 switches from the unlocked state to the locked state , the first portion 306 of the first prong 304 snaps into or engages one of the enlarged aperture regions ( 210 ; fig2 ) in the first plurality , thereby locking the stop element 300 to the proximal reamer ( 200 ; fig2 ). the stop element 300 can include a first button 308 disposed on the first prong 304 and configured to transmit radially - inward force to the first prong . when the stop element 300 is locked to the proximal reamer ( 200 ; fig2 ), the radially - inward force can radially compress the stop element 300 , thereby unlocking the stop element 300 from the proximal reamer ( 200 ; fig2 ). when the stop element 300 is in the unlocked state , a user can apply a longitudinal force to the first button 308 , which can longitudinally translate the stop element 300 with respect to the proximal reamer ( 200 ; fig2 ). in some examples , the stop element 300 can include first and second buttons 308 , 314 disposed on the first and second prongs 304 , 310 , respectively , and configured to transmit radially - inward force to the first and second prongs 304 , 310 , so that when the stop element 300 is locked to the proximal reamer , the radially - inward force can radially compress the stop element 300 , thereby unlocking the stop element 300 from the proximal reamer . in some examples , such as the example of fig3 , the stop element can be u - shaped . in some examples , a bottom of the u - shape can be configured to abut the distal reamer . in some examples , a top of the u - shape can include the first and second prongs 304 , 310 . fig4 is a cross - sectional view of a portion of the stop element 300 of fig3 , disposed within the proximal reamer 200 . in some examples , the stop element 300 can include first and second prongs 304 , 310 biased to extend radially outward in opposite directions from within the proximal reamer 200 . a first portion of the first prong 304 can be sized larger than a circumferential diameter of the first longitudinal slot 208 and smaller than the enlarged aperture regions 210 in the first plurality . likewise , a first portion of the second prong 310 can be sized larger than a circumferential diameter of a second longitudinal slot 414 and smaller than enlarged aperture regions 416 in the second plurality . when the stop element 300 switches from the unlocked state to the locked state , the first portions of the first and second prongs 304 , 310 snap into corresponding enlarged aperture regions 210 , 416 in the first and second pluralities , thereby locking the stop element 300 to the proximal reamer 200 . fig5 is a perspective view of an example of the stop element 300 disposed within the proximal reamer 200 . the configuration of fig5 is but one example ; other suitable configurations can also be used . when the stop element 300 is in the unlocked state , the first button 308 , or the first and second buttons 308 , 314 , can longitudinally translate the stop element with respect to the proximal reamer 200 . the buttons can be used to unlock the stop element from a first opposing pair of enlarged aperture regions ( by pressing the buttons together , thereby radially compressing the stop element ), reposition the stop element along opposing longitudinal slots to a second opposing pair of enlarged aperture regions , and lock the stop element ( by allowing the prongs to snap radially outward through the second opposing pair of enlarged aperture regions , thereby radially expanding the stop element ). the proximal reamer 200 can optionally include indicia 216 , such as one or more letters , one or more numbers , one or more patterns , one or more colors , and others . the indicia 216 can provide visual identification of the corresponding enlarged aperture region 210 . in some examples , an adjustable reaming device can include the proximal reamer and the stop element . in other examples , the adjustable reaming device can include the proximal reamer , the stop element , and a longitudinally - elongated distal reamer , such as 106 ( fig1 ). the distal reamer can be insertable into the distal opening of the proximal reamer . the distal reamer can be rotationally uncoupled from the proximal reamer . the stop element limits longitudinal motion of the proximal reamer in the distal direction , with respect to the distal reamer , but not in the proximal direction , with respect to the distal reamer . in the examples of fig2 - 5 , a positionable element locks to a proximal reamer by using outwardly - biased prongs that snap radially outward into enlarged aperture regions when the positionable element is suitable positioned along the proximal reamer . to unlock the positionable element from the proximal reamer , a user forces a pair of buttons against each other , thereby forcing the prongs radially inward and releasing them from the enlarged aperture regions . this is but one example of a locking / unlocking mechanism . the examples of fig6 - 10 can use a locking / unlocking mechanism in which a user locks the positionable element to the proximal reamer by pivoting the positionable element about its longitudinal axis , with respect to the proximal reamer . as the user pivots these elements with respect to each other , an outward - extending prong can travel along a circumferential slot . the end of the circumferential slot can include a spring mechanism that locks the prong to the end of the slot . the user can unlock the positionable element from the proximal reamer by pivoting the elements in the opposite direction with a torque that exceeds a specified threshold , thereby overcoming the spring mechanism . the examples of fig6 - 10 are but one locking / unlocking mechanism ; other suitable mechanisms can also be used . fig6 is a perspective view of another example of a proximal reamer 600 . the configuration of fig6 is but one example ; other suitable proximal reamers can also be used . a distal end 602 of the proximal reamer 600 can define a distal opening 604 into an interior of the proximal reamer 600 . the distal end 602 of the proximal reamer 600 can include at least one cutting flute 606 surrounding the distal opening 604 . the proximal reamer 600 can define at least one longitudinal slot 608 formed in an outer surface 618 of the reamer , as well as a plurality of circumferential slots 610 therethrough . each circumferential slot 610 in the plurality can have a first end that is connected to the longitudinal slot 608 . each circumferential slot 610 in the plurality can have a second end that includes a spring mechanism ( discussed below and shown in fig9 and 10 ). the proximal reamer 600 can be elongated along longitudinal axis 612 . the proximal reamer 600 can also include indicia 614 , which can provide visual identification for each of the circumferential slots 610 . fig7 is a perspective view of an example of a driver 700 . during use , the driver 700 can be partially or fully disposed within the interior of the proximal reamer ( 600 ; fig6 ). the driver 700 can be elongated along longitudinal axis 706 . a distal end 702 of the driver 700 can be configured to contact a proximal end of a distal reamer insertable into the distal opening ( 604 ; fig6 ) of the proximal reamer ( 600 ; fig6 ). the driver 700 can include a prong 704 extending radially outward from within the proximal reamer ( 600 ; fig6 ). the prong 704 can be sized to fit within the longitudinal slot ( 608 ; fig6 ) and the circumferential slots ( 610 ; fig6 ) in the plurality . the driver 700 can include a reamer quick - connection 708 positioned on a proximal end of the driver . fig8 is a perspective view of an example of the proximal reamer 600 of fig6 having the driver 700 of fig7 disposed therein . during use , the reamer quick - connection 708 on the driver 700 can extend proximally beyond a proximal end of the proximal reamer 600 . during use , the longitudinal axes of the driver 700 and the proximal reamer 600 can coincide , along longitudinal axis 808 . during use , the driver 700 can be switched between an unlocked state , in which the driver 700 is longitudinally positionable with respect to the proximal reamer 600 , and a locked state , in which the driver 700 is locked to the proximal reamer 600 at one of a plurality of discrete , specified longitudinal locations along the proximal reamer 600 . when the driver 700 switches from the unlocked state to the locked state , the driver 700 can be positioned longitudinally so that the prong ( 704 ; fig7 ) aligns with one of the circumferential slots ( 610 ; fig6 ), then the driver 700 is rotated about longitudinal axis 808 so that the prong ( 704 ; fig7 ) traverses the circumferential slot ( 610 ; fig6 ) and engages the spring mechanism ( discussed below and shown in fig9 and 10 ). fig9 more clearly shows the prong 704 on the driver 700 , and the longitudinal slot 608 , circumferential slot 610 , and spring mechanism 910 on the proximal reamer 600 . fig9 omits some features from the driver 700 and the proximal reamer 600 , in order to emphasize the prong 704 , the longitudinal slot 608 , the circumferential slot 610 , and the spring mechanism 910 . the prong 704 can be sized to fit into both the longitudinal slot 608 and the circumferential slot 610 . in particular , the prong 704 can have a circumferential diameter matched to a circumferential diameter of the longitudinal slot 608 . the prong 704 can also have a longitudinal diameter matched to a longitudinal diameter of the circumferential slot 610 . fig1 is a perspective view of an example of the portion of the driver of fig9 , attached to the example of the portion of the proximal reamer of fig9 . a user can engage the driver 700 and the proximal reamer 600 with a push - and - twist motion . the user can push , moving the prong 704 along the longitudinal 608 until the prong is longitudinally aligned with a one of the circumferential slots 610 . the user can then twist , moving the prong 704 along the circumferential slot 610 . at the end of the twisting motion , the prong 704 can engage the spring mechanism 910 . the spring mechanism can engage when a torque or a force exceeds a particular engagement threshold . in the example of fig9 , the spring mechanism 910 includes a relatively thin spring member , which forms a wall of the circumferential slot 610 . the spring member deforms when the prong 704 passes through the circumferential slot 610 , and returns to an undeformed or relaxed state when the prong 704 reaches the end of the circumferential slot 610 . the deformation of the spring member holds the prong 704 in place at the end of the circumferential slot 610 . the spring mechanism 910 can be disengaged by applying the twisting motion in the opposite direction . the spring mechanism can disengage when the torque or force exceeds a particular disengagement threshold . in some examples , the disengagement threshold is the same as the engagement threshold . in some examples , an adjustable reaming device can include the proximal reamer and the driver . in other examples , the adjustable reaming device can include the proximal reamer , the driver , and a longitudinally - elongated distal reamer , such as reamer 106 ( fig1 ). the distal reamer can be insertable into the distal opening of the proximal reamer . the distal reamer can be rotationally uncoupled from the proximal reamer . the configuration limits longitudinal motion of the proximal reamer in the distal direction , with respect to the distal reamer , but not in the proximal direction , with respect to the distal reamer . fig1 is a flow chart of an example of a method 1100 for adjusting a reaming device . the method can be executed by the adjustable reaming device of fig2 - 5 , the adjustable reaming device of fig6 - 10 , or another suitable adjustable reaming device . the method of fig1 is but one example ; other suitable examples can also be used . at 1102 , method 1100 provides a longitudinally - elongated proximal reamer , such as 200 ( fig2 ) or 600 ( fig6 ), or other suitable proximal reamers . a distal end of the proximal reamer can define a distal opening into an interior of the proximal reamer . at 1104 , method 1100 positions a positionable element longitudinally within the proximal reamer . in some examples , the positionable element can be a stop element , such as 300 ( fig3 ). in other examples , the positionable element can be a driver , such as 700 ( fig7 ). a distal end of the positionable element can be configured to abut a distal reamer insertable into the distal opening , thereby limiting longitudinal motion of the proximal reamer in the distal direction , with respect to the distal reamer , but not in the proximal direction , with respect to the distal reamer . at 1106 , method 1100 locks the positionable element to the proximal reamer at one of a plurality of discrete , specified longitudinal locations along the proximal reamer . the locations can be defined by the proximal reamer , the positionable element , or by both the proximal reamer and the positionable element . in some examples , method 1100 can further include unlocking the positionable element from the proximal reamer . in some examples , method 1100 can further include repositioning the positionable element longitudinally within the proximal reamer to another of the discrete , specified longitudinal locations in the plurality . in some examples , method 1100 can further include locking the positionable element to the proximal reamer . the following non - limiting list of examples can further illustrate the present adjustable reaming device and method for adjusting a reaming device . in example 1 , an adjustable reaming device can comprise a longitudinally - elongated proximal reamer , a distal end of the proximal reamer defining a distal opening into an interior of the proximal reamer , the distal end of the proximal reamer including a cutting flute surrounding the distal opening ; and a stop element disposed within the interior of the proximal reamer , a distal end of the stop element being configured to contact a proximal end of a distal reamer insertable into the distal opening of the proximal reamer ; wherein the stop element is switchable between an unlocked state , in which the stop element is longitudinally positionable with respect to the proximal reamer , and a locked state , in which the stop element is locked to the proximal reamer at one of a plurality of discrete , specified longitudinal locations along the proximal reamer . in example 2 , the adjustable reaming device of example 1 can optionally be configured such that the proximal reamer further defines a first longitudinal slot and a first plurality of enlarged aperture regions along the first longitudinal slot ; and the stop element includes a first prong biased to extend radially outward from within the proximal reamer , a first portion of the first prong being sized larger than a circumferential diameter of the first longitudinal slot and smaller than the enlarged aperture regions in the first plurality . in example 3 , the adjustable reaming device of example 2 can optionally be configured such that when the stop element switches from the unlocked state to the locked state , the first portion of the first prong snaps into one of the enlarged aperture regions in the first plurality , thereby locking the stop element to the proximal reamer . in example 4 , the adjustable reaming device of example 3 can optionally further comprise a first button disposed on the first prong and configured to transmit radially - inward force to the first prong , so that when the stop element is locked to the proximal reamer , the radially - inward force radially compresses the stop element , thereby unlocking the stop element from the proximal reamer . in example 5 , the adjustable reaming device of example 4 can optionally be configured such that when the stop element is in the unlocked state , an applied longitudinal force on the first button longitudinally translates the stop element with respect to the proximal reamer . in example 6 , the adjustable reaming device of one of examples 1 - 5 can optionally be configured such that the proximal reamer further defines first and second longitudinal slots on opposite sides of the proximal reamer ; the proximal reamer further defines first and second pluralities of enlarged aperture regions along the first and second longitudinal slots , respectively , each enlarged aperture region in the first plurality being positioned at the same location as a corresponding enlarged aperture region in the second plurality ; and the stop element includes first and second prongs biased to extend radially outward in opposite directions from within the proximal reamer , a first portion of the first prong being sized larger than a circumferential diameter of the first longitudinal slot and smaller than the enlarged aperture regions in the first plurality , a first portion of the second prong being sized larger than a circumferential diameter of the second longitudinal slot and smaller than the enlarged aperture regions in the second plurality . in example 7 , the adjustable reaming device of example 6 can optionally be configured such that when the stop element switches from the unlocked state to the locked state , the first portions of the first and second prongs snap into corresponding enlarged aperture regions in the first and second pluralities , thereby locking the stop element to the proximal reamer . in example 8 , the adjustable reaming device of example 7 can optionally further comprise first and second buttons disposed on the first and second prongs , respectively , and configured to transmit radially - inward force to the first and second prongs , so that when the stop element is locked to the proximal reamer , the radially - inward force radially compresses the stop element , thereby unlocking the stop element from the proximal reamer . in example 9 , the adjustable reaming device of example 8 can optionally be configured such that when the stop element is in the unlocked state , applied longitudinal forces on the first and second buttons longitudinally translate the stop element with respect to the proximal reamer . in example 10 , the adjustable reaming device of example 9 can optionally be configured such that the stop element is u - shaped ; a bottom of the u - shape is configured to abut the distal reamer ; and a top of the u - shape includes the first and second prongs . in example 11 , the adjustable reaming device of one of examples 1 - 10 can optionally further comprise a reamer quick - connection positioned on a proximal end of the proximal reamer . in example 12 , the adjustable reaming device of one of examples 1 - 11 can optionally further comprise a longitudinally - elongated distal reamer insertable into the distal opening of the proximal reamer , the distal reamer being rotationally uncoupled from the proximal reamer ; wherein the stop element limits longitudinal motion of the proximal reamer in the distal direction , with respect to the distal reamer , but not in the proximal direction , with respect to the distal reamer . in example 13 , an adjustable reaming device can comprise a longitudinally - elongated proximal reamer , a distal end of the proximal reamer defining a distal opening into an interior of the proximal reamer , the distal end of the proximal reamer including at least one cutting flute surrounding the distal opening ; and a driver disposed within the interior of the proximal reamer , a distal end of the driver being configured to contact a proximal end of a distal reamer insertable into the distal opening of the proximal reamer ; wherein the driver is switchable between an unlocked state , in which the driver is longitudinally positionable with respect to the proximal reamer , and a locked state , in which the driver is locked to the proximal reamer at one of a plurality of discrete , specified longitudinal locations along the proximal reamer . in example 14 , the adjustable reaming device of example 13 can optionally be configured such that the proximal reamer defines a longitudinal slot and a plurality of circumferential slots , each circumferential slot in the plurality having a first end that is connected to the longitudinal slot , each circumferential slot in the plurality having a second end that includes a spring mechanism . in example 15 , the adjustable reaming device of example 14 can optionally be configured such that the driver includes a prong extending radially outward from within the proximal reamer , the prong being sized to fit within the longitudinal slot and the circumferential slots in the plurality . in example 16 , the adjustable reaming device of example 15 can optionally be configured such that when the driver switches from the unlocked state to the locked state , the driver is positioned longitudinally so that the prong aligns with one of the circumferential slots , then the driver is rotated about a longitudinal axis so that the prong traverses the circumferential slot and engages the spring mechanism . in example 17 , the adjustable reaming device of one of examples 13 - 16 can optionally further comprise a reamer quick - connection positioned on a proximal end of the driver . in example 18 , the adjustable reaming device of one of examples 13 - 17 can optionally further comprise a longitudinally - elongated distal reamer insertable into the distal opening of the proximal reamer , the distal reamer being rotationally uncoupled from the proximal reamer ; wherein the driver limits longitudinal motion of the proximal reamer in the distal direction , with respect to the distal reamer , but not in the proximal direction , with respect to the distal reamer . in example 19 , a method for adjusting a reaming device can comprise providing a longitudinally - elongated proximal reamer , a distal end of the proximal reamer defining a distal opening into an interior of the proximal reamer ; positioning a positionable element longitudinally within the proximal reamer , a distal end of the positionable element being configured to abut a distal reamer insertable into the distal opening , thereby limiting longitudinal motion of the proximal reamer in the distal direction , with respect to the distal reamer , but not in the proximal direction , with respect to the distal reamer ; and locking the positionable element to the proximal reamer at one of a plurality of discrete , specified longitudinal locations along the proximal reamer . in example 20 , the method of example 19 can optionally further comprise unlocking the positionable element from the proximal reamer ; repositioning the positionable element longitudinally within the proximal reamer to another of the discrete , specified longitudinal locations in the plurality ; and locking the positionable element to the proximal reamer . in example 21 , the adjustable reaming device or method of any one or any combination of examples 1 - 20 can optionally be configured such that all elements , operations , or other options recited are available to use or select from . the above detailed description includes references to the accompanying drawings , which form a part of the detailed description . the drawings show , by way of illustration , specific embodiments in which the invention can be practiced . these embodiments are also referred to herein as “ examples .” such examples can include elements in addition to those shown or described . however , the inventors also contemplate examples in which only those elements shown or described are provided . moreover , the inventors also contemplate examples using any combination or permutation of those elements shown or described ( or one or more aspects thereof ), either with respect to a particular example ( or one or more aspects thereof ), or with respect to other examples ( or one or more aspects thereof ) shown or described herein . in this document , the terms “ a ” or “ an ” are used , as is common in patent documents , to include one or more than one , independent of any other instances or usages of “ at least one ” or “ one or more .” in this document , the term “ or ” is used to refer to a nonexclusive or , such that “ a or b ” includes “ a but not b ,” “ b but not a ,” and “ a and b ,” unless otherwise indicated . in this document , the terms “ including ” and “ in which ” are used as the plain - english equivalents of the respective terms “ comprising ” and “ wherein .” also , in the following claims , the terms “ including ” and “ comprising ” are open - ended , that is , a system , device , kit , article , composition , formulation , or process that includes elements in addition to those listed after such a term in a claim are still deemed to fall within the scope of that claim . moreover , in the following claims , the terms “ first ,” “ second ,” and “ third ,” etc . are used merely as labels , and are not intended to impose numerical requirements on their objects . the above description is intended to be illustrative , and not restrictive . for example , the above - described examples ( or one or more aspects thereof ) can be used in combination with each other . other embodiments can be used , such as by one of ordinary skill in the art upon reviewing the above description . the abstract is provided to allow the reader to quickly ascertain the nature of the technical disclosure . it is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims . also , in the above detailed description , various features can be grouped together to streamline the disclosure . this should not be interpreted as intending that an unclaimed disclosed feature is essential to any claim . rather , inventive subject matter can lie in less than all features of a particular disclosed embodiment . thus , the following claims are hereby incorporated into the detailed description as examples or embodiments , with each claim standing on its own as a separate embodiment , and it is contemplated that such embodiments can be combined with each other in various combinations or permutations . the scope of the invention should be determined with reference to the appended claims , along with the full scope of equivalents to which such claims are entitled .
an adjustable reaming device can include a proximal reamer and a positionable element . the positionable element removably attaches to the proximal reamer at one of a plurality of discrete longitudinal locations along the proximal reamer . a distal end of the positionable element forms a stop , which can contact a proximal end of a distal reamer and thereby limit distal motion of the proximal reamer with respect to the distal reamer . when the distal reamer is in contact with the positionable element , the distal reamer and proximal reamer are longitudinally offset by a one of a plurality of specified offsets . in some examples , the specified offsets correspond to a plurality of specified , discrete lengths for which implantable femoral stems are available .