fig1 shows a first one of the two pieces making up the entire device . the piece of fig1 , identified as 30 , includes a strip 32 , which may also be referred to as the body of the piece . the piece at its upper end 31 , ( fig1 ) includes a wedge element 34 , which may be referred to as a heard , and its lower end 38 , which may also be referred to as its leading end , is tapered . as noted above the entire item is composed of plastic and is a single , integrated one - piece item . in the form of fig1 , the piece 30 may be of any of a plurality of different shapes and forms , but in the present case , the wedge element 34 may be round , or conical . the strip 32 is flat and relatively thin , with grooves and notches 33 having prongs 35 near the top thereof for retaining the piece in mounted position as referred to below , and cross ribs 36 for interlocking it with the other piece . these ribs are distributed along the strip from an upper point 37 below the grooves 33 to a lower point 38 near the lower end and the tapered lower end 39 may be smooth . reference is now made to the second piece , identified 40 , in fig2 . this piece includes a body or relatively thin flat strip 42 having a top surface 42 ′ and a first head 43 at a first end 44 and a second head 45 at its other and second end . each of the pieces 30 , 40 is independently molded and there are no elements of non - plastic character utilized in either of the pieces . it is not necessary for the user to cut any openings in the device in applying it to its position of use , or in its functioning in holding the wires or cables . the first head 43 ( fig3 ) is cylindrical and hollow and extends in one direction from the body or strip 42 ( fig5 ) in this case upwardly . the first head 43 is provided with a series of radial notches or cuts 46 - 46 such as seven or eight or more in number , forming a corresponding number of fingers 48 - 48 in the peripheral wall of the cylinder . in using the device , the operator inserts the stem 32 of the first piece into and through the first head 43 ( fig2 ) to the position of fig5 . at this position the wedge 34 , or head does not enter into the cylindrical first head 43 , but does so at a later step as described below . in a first step , the first piece 30 is moved only down to the position of fig5 in which the wedge element engages only the upper ends of the prongs 48 - 48 . as a next step , the assembly of the two pieces as shown in fig5 is positioned for inserting into a wall 50 as shown in fig6 . a hole 52 is first drilled in the wall at what is conveniently referred to as a mounting position or mounting station 54 ( fig7 ). this hole is cut through the wall to a convenient distance for mounting the device on the wall . it may be partially through , or entirely through , the wall , as desired . the wall element 50 may also be referred to as a panel , since the device is well adapted to mounting wires , cables , etc . in any of the various places . a wall may be a most common example in which the device is utilized , but it is also well adapted for use in connection with a panel . a panel may be in any of various positions , whereas a wall is usually vertical , and a point is made of the fact that the device is easily usable in any position of the panel . following the foregoing , the assembly of the two pieces connected as in fig5 , and identified 58 is positioned relative to the wall or panel , as represented in fig6 and then it is moved toward the wall , and the first head 42 , with the wedge 34 as a unit , is inserted through the hole 52 ( fig7 ) to a position in which the body or the strip 42 of the piece 40 engages flat against the wall . thereafter , in the use of the device , constant pressure is imposed against the second piece as represented by the arrow 56 , in fig7 . at this point , the strip 30 ( fig7 ) is pulled downwardly , while the pressure is maintained according to the arrow 56 . the strip may be pulled by gripping it by the hand or by a pair of pliers , and as it is pulled down , the head or wedge 34 is pulled into the cylindrical first head 43 as shown in fig8 a . in this step , the wedge 34 spreads the fingers 48 - 48 radially and they are bent so that the ends thereof engage the wall 51 . this engagement by the fingers with the wall prevents the first piece from being pulled entirely through the cylindrical head . the head 43 is provided with a counterbore 58 ( see fig8 a ). this counterbore extends from the inner ( or upper ) end of the tubular fingers 48 to a position above the top surface 42 ′. as the wedge 34 enters into the head 43 , that is , into the space between the fingers , and as it spreads the fingers , the inner and thinner portions of the fingers provided by the counterbore facilitates the flexing of the fingers 48 - 48 outwardly . the positions of the fingers pursuant to such flexing is shown at 62 ′ in fig8 a . the fingers 48 do not lose their resiliency , and they tend to move back to their original cylindrical position , or as stated in another way , and as viewed in fig8 a , their outer ends tend to move upwardly and urge the entire first piece 30 upwardly . as long as pressure or tension is applied to the first piece in pulling it down , the relationship between the various members and elements remains in proper condition , but after that pulling effect is released from the first piece 30 , if the first piece were not held positively in a downward position , it would be urged upwardly by the reverse movement of the fingers 48 - 48 . the fingers 48 ( fig3 ) are so dimensioned and located as to be responsive well to the wedge whether the latter is round , or polygonal . an important feature of the present invention is to prevent any reverse movement of the fingers 48 - 48 or of the entire piece 30 . for this purpose , the first head 43 at its lower end ( fig4 ) is provided with a series of notches 60 - 60 in the wall thereof leaving a corresponding number of prongs 62 - 62 . these prongs and notches are shown in fig8 . correspondingly , the grooves 33 - 33 ( fig1 ) are positioned at an axial distance from the wedge 34 as to engage the prongs 62 - 62 in the second head 42 ( fig8 a ). the prongs 62 - 62 similarly to other elements of the device , possess a certain degree of resilience or springiness , and the grooves 33 - 33 engage these prongs 62 - 62 to prevent the first piece from being withdrawn from the second head . more specifically , as the fingers 48 tend to resume their original position they urge the first piece upwardly , as stated above , and a friction and holding effect is established between the prongs 62 - 62 and the groove top surface 35 to prevent the first piece from being moved objectionably upwardly . thus the first piece can be easily and quickly drawn into its final position manually , and it is held in that position , from going further inwardly beyond the fingers 48 and prevented from being withdrawn reversely by the groove top surfaces 35 - 35 and prongs 62 - 62 ( fig8 a ). as a next step in using the device , the user grasps the strip 42 ( fig9 ) and plies it against a bundle of wires 66 , and then draws up the strip 32 around the wires with the leading end 38 directed up to the second head 45 and inserts it through a hole 70 in the second head 45 ( fig9 ). if the strip 32 is round , the hole 70 may be provided with a single spur 92 ( fig1 and 14 ) which grips into the body of the strip 32 and holds it there against any force tending to withdraw it . this drawing up and tying is increased , or intensified until all of the wires are so tied . this constitutes tying or anchoring the wires in a desired location , and then the user may go to a next station or location to install another tie . other shapes which the strip 32 may assume , are represented in fig1 - 13 . these latter figures represent “ first ” pieces as identified above , that are non - circular . the piece 80 of fig1 has a body 82 that is thin and flat , and has transverse ribs 84 for facilitating gripping it and holding it in place . the wedge 86 thereon may be round or polygonal . in fig1 and 13 , the piece 88 has a central body portion 90 of relatively greater thickness with transverse ribs 91 , and side longitudinal ribs 94 . the wedge 96 is preferably polygonal . fig1 shows a head 98 corresponding to the head 45 but having an opening 100 shaped for receiving the strip 88 of fig1 and 13 . while the proportions of the various elements as shown and described hereinabove , constitute a preferred use of the device , it is also possible to use it as a rivet . referring to fig7 for example , when the second piece is applied to the wall , it may be cut at the line 102 ( fig7 ) and the excess material ( at the left ) discarded leaving the anchoring effect in a single circular area slightly larger than the first head 42 . the various pieces , elements , parts , are all very simple and can be predesigned to accommodated substantially any kids and shapes of the pieces . fig1 shows another simple form that the device may assume . in this case , the device , indicated in its entirety positioned at a wall 102 and having a hole 104 therein . the device includes an outer bell - shaped tubular element 106 with circumferential teeth or locking ribs 108 . the element 106 at its inner end includes a plate 109 having its outer periphery engaging the wall element . this plate has a hole 110 for the insertion therethrough of a strip 112 corresponding to the strip 32 of the first form ( fig1 ). the strip 112 at its lower end includes circumferential ribs or teeth 114 engageable with the teeth 108 to prevent withdrawal of the strip 92 upwardly . the element 106 has circumferentially spaced , longitudinal gaps 116 ( fig1 ) to enable the parts 111 between the gaps to be sprung radially outwardly upon insertion of the strip 112 .