The Clamp-Lock termination system provides a maintenance-free connection. This revolutionary system actually gets stronger as the cable is pulled, which provides peace of mind knowing this durable trouble-free solution can handle heat, shock and vibration. Most importantly, Clamp-Lock enables wiring termination up to 50 percent faster than conventional screw termination products resulting in a more cost-effective process. Use the built-in gauge to measure how much wire casing should be stripped. Then, to connect the three wires, simply open the color-coded green, white and black cam levers, insert the wires and then close the cam levers. No tools are needed. The compression fit receptor bites into the wire and doesn't let go. Slide the housing over the connection and lock it positively in place with two captive screws.