Ratcheting crimp tool for spark plug wires and other electrical connectors.The best crimping tool available for making custom wire sets or wiring. Contructed with a heavy duty hardened steel frame with molded non slip hand grips. An adjustable ratchet mechanism produces consistent factory style high quality crimps. The 300+ crimp tool is supplied with three removable stripping and crimping die jaws, one for primary wire terminals, and one for pre insulated terminals.