are preset in a selected angle 78 shown in fig5 which is preferably 15 u00b0 in an outward direction from either end of the case this angle may vary however from 5 u00b0 to 30 u00b0 smaller angles do not insure that each finger will deflect outwardly from the respective end of the case a greater angle provides insufficient pressure on the cable to effect positive engagement between the case and the cable to preclude any axial movement of the case along the cable as shown in the drawings both the inner and outer surfaces of each finger are inclined outwardly of the case the inner fingers 76 extends inwardly from the inner periphery of each semicircular recess while the fingers 74 76 are generally triangular as best shown in fig3 each finger has a truncated apex so that even with the fingers in their preset undeformed positions as they are represented in fig3 through 5 an opening remains near the center of the semicircular port the opening is selected to be at least slightly smaller than the smallest diameter cable to be serviced by the case since no cable smaller than this diameter is meant for use with the case the presence of pointed apexes for each triangular finger would be counter productive and would reduce the usefullness of the case for larger diameter cables which approach the diameter of the semicircular port the preset angle between each finger and a respective end wall defines a curved bend line 84 which facilitates bending of the fingers at a desired location namely at the bend line when a large diameter cable is engaged by the case slots 68 are provided under each detent.