Have you lost your interchangeable tightening keys? Or maybe just need a few more? This pack contains four tightening keys to be used with your TWIST™ & SPIN™ cables, connectors or stoppers. Simply use the key as a handle to help you grasp and tighten the screw connection. Use the key EVERY time you attach your tips to a cable. You will need the key to loosen the connection when removing the tips from the cable.