many buckles take the form of a male piece that secures to one end of a strap and a female piece that secures to the other end of a strap . for example , a side release buckle may include a male piece having one or more prongs , and a female piece having a receptacle and one or more openings to releasably catch the prongs of the male piece . however , the use of different male and female pieces requires separate molds to produce each part . further , in the event that a user breaks one of the parts , the user may have to buy both parts in a replacement kit , thus obtaining an unneeded part to replace the needed part . accordingly , examples are disclosed herein that relate to side release buckles that include the use of a single buckle piece design configured to latch to another piece of the same configuration . as described in more detail below , the buckle piece includes a male portion having an arm with a latch configured to be inserted in a female portion of another identical buckle piece , and a female portion having a receptacle and catch for receiving the latch of the male portion of the other identical buckle piece . the term “ same configuration ” is used herein to describe buckle pieces formed from a same mold and that are configured to connect to one another . in this sense , pairs of buckle pieces of the disclosed side release buckles may be considered to be “ identical ” to one another , although small variations may actually exist due to molding process tolerances , etc . the use of a single buckle piece design allows a single mold to be used to form both pieces of the buckle , rather than separate molds for male and female pieces . this may reduce tooling costs , and also may provide for the convenient manufacture and sale of standalone replacement pieces . further , the disclosed examples include features that enable the buckle to be selectively used in a left - handed or right - handed configuration . fig1 shows an example buckle 100 comprising two identical buckle pieces 101 fastened together . each buckle piece 101 includes a side release latch 102 secured in place by a catch 103 of the other buckle piece . further , each buckle piece has a diagonally extending interface 104 at which it meets the other buckle piece . the side release latches 102 are offset diagonally from each other , for example , with respect to an axis of a long direction y of the buckle . the two buckle pieces may be released from each other by pressing side release latches 102 toward each other along a diagonal axis 106 extending between the side release latches 102 . the diagonal offset of the side release latches 102 may enable the side release latches 102 to be squeezed together with one hand while the hand and wrist are held in a comfortable position , compared to traditional side release latches that are not offset in such a manner . this may allow the two buckle pieces to be released by pressing the side release latches 102 in a fluid snapping motion of the hand . in the depicted example , each side release latch 102 includes a planar surface 107 that is oriented approximately normal to the axis 106 to make the release operation comfortable on a user &# 39 ; s fingers . in other examples , this surface may have any other suitable configuration . the relative locations of the top and bottom side release latches may be reversed by turning the buckle over . this may allow the buttons to be positioned either for left - handed operation or right - handed operation , as mentioned above . as such , a strap interface 108 of each buckle may be designed such that a strap can be inserted into the strap interface 108 from either side for retention . for example , the strap interface 108 may include strap retention features that are symmetrical along a longitudinal plane of the buckle - e . g . a plane parallel to direction y in one dimension and normal to the page in the other dimension , bisecting the buckle . the strap interface 108 is described in more detail below with regard to fig3 . fig2 - 5 show various views of buckle piece 101 . as mentioned above , buckle piece 101 includes a male portion 200 that includes an arm 202 on which the releasable latch 102 is located , and also a female portion 204 including a receptacle 206 for receiving the male portion of another buckle piece . the female portion 204 includes a side opening 206 that defines a catch 103 for retaining the releasable latch of the other buckle piece . the buckle piece 101 also includes a middle prong 208 that includes a tongue and groove configuration . the tongue 210 of middle prong 208 is configured to fit within the groove 212 of the middle prong of the other buckle piece when buckled , thereby providing additional stability to the buckle when two buckle pieces are engaged . the middle prong 208 may further help guide the two buckle pieces together when engaging the pieces . a distal end 214 of the middle prong 208 may have a tapered shape , as depicted , to help avoid any blocking , accidental catching , or any other difficulties that may arise when engaging the pieces . it will be understood that the middle prong may have any other suitable configuration , and may be omitted in some examples . fig6 shows a cross - sectional view of the buckle piece 101 taken along section 6 - 6 of fig2 , and illustrates the strap interface 108 in more detail . the strap interface 108 includes opposing strap engagement features 604 and 606 , each having mirror plane symmetry along a plane that bisects features 604 and 606 . this is in contrast with conventional side release buckles , which generally do not include strap engagement features having such symmetry . the symmetric strap engagement features 604 , 606 have corners 608 , 610 , and 612 that frictionally engage a strap surface when looped through the interface 302 , thus helping to prevent strap slippage . the symmetry of the strap interface 108 allows a strap to be fitted through the interface 108 in the same manner from either side of the buckle piece , thus contributing to the reversibility of the buckle . in other examples , the symmetric strap engagement features may include any other suitable number of corners than the number of corners shown , and further may include any other suitable catch points than the corners 608 , 610 , and 612 . fig7 - 10 show various views of another example buckle piece 700 . buckle piece 700 includes a male portion 702 that includes an arm 704 on which a releasable latch 706 is located , and a female portion 708 including a receptacle 710 for receiving the male portion of another buckle piece . the female portion 708 includes a side opening 712 that defines a catch 714 for retaining the releasable latch of the other buckle piece . buckle piece 700 also includes a middle prong 716 that includes another example of a tongue and groove configuration configured to provide additional stability when two of the buckle pieces 700 are engaged . in this example , the tongue 718 is configured to fit within the groove 720 of the middle prong of the other buckle piece when buckled . in contrast to the tapered shape of the middle prong of fig2 - 5 , a distal end 722 of middle prong 716 has a widened shape , which allows for guided insertion of the tongue 718 into the groove of the other buckle piece . fig1 shows a cross - sectional view taken along section 10 - 10 of fig9 , and illustrates another example symmetrical strap interface 1000 including opposing strap engagement features 1002 and 1004 , each having mirror plane symmetry along a plane that bisects features 1002 and 1004 . the symmetric strap engagement features 1002 , 1004 each have a plurality of corners that frictionally engage a strap when looped through the strap interface 1000 . in contrast to the strap engagement features shown in fig6 , strap engagement feature 1004 has a star - shaped configuration that includes a greater number of corners , and thus may provide a greater amount of friction for engaging a strap . as mentioned above , a symmetrical strap interface allows a strap to be fitted through in the same manner from either side of the buckle piece , allowing reversibility of the buckle . in combination with the reversibility of the releasable side latches when two of the buckle pieces are buckled , the buckle pieces as disclosed herein may allow the buckle to be easily switched to and from left - handed and right - handed configurations . it is to be understood that the configurations described herein are exemplary in nature , and that these specific embodiments or examples are not to be considered in a limiting sense , because numerous variations are possible . the subject matter of the present disclosure includes all novel and non - obvious combinations and sub - combinations of the various devices and configurations , and other features , functions , and / or properties disclosed herein , as well as any and all equivalents thereof .