If you make numbers of plug wires or do a lot of custom wiring, the Pro-Crimp Tool is a must for your toolbox. The Pro-Crimp features a hardened steel frame with comfortable molded hand grips. The slick ratchet action provides secure, factory quality crimps every time. The Tool is supplied with precision crimping/stripping jaws for MSD's spark plug wire terminals.Features:Interchangeable Jaws; Includes Spark Plug Wire Crimping/Stripping Jaws;