Replacement Screws and End Caps for WODFitters Cable Jump Ropes This is a replacement 4-pack (2 pairs) of adjustable screws and end caps for use with the WODFitters Ultra Speed Cable Jump Rope, the WODFitters Bearing PRO Speed Rope. These fasteners can also work with other similar cable jump ropes. These set screws allow you to properly adjust the rope's length for different sized athletes. This is the same adjustable set screw that ships standard with orders of the WODFitters jump ropes. Replacements are often necessary, however, as screws can fly off if not tightened securely. 100% Satisfaction Guarantee