Use for crimping heat shrink, vinyl and nylon insulated terminals and connectors. Tools must be fully closed before they will open, ensuring a proper crimp. Each includes a lever to release jaws mid-cycle in the event of an incorrectly placed terminal. Ratcheting operation with ergonomic handle reduces hand fatigue. Four color-coded cavities for different wire sizes. Tools measure 10 1/4"L. Crimps wire gauges of AWG 22-8.