If you make numbers of plug wires or do custom wiring, the MSD Pro-Crimp Tool is a must for your toolbox. The Pro-Crimp features interchangeable jaws allowing for a variety of different style crimps with one heavy-duty tool. The Pro-Crimp features a hardened steel frame with comfortable moulded hand grips. The slick ratchet action provides secure, factory quality crimps every time. The MSD crimping tool is supplied with precision crimping/stripping jaws for MSD’s spark plug wire terminals. Features interchangeable jaws allowing for a variety of different style crimps with one heavy-duty tool. Alternative jaws sold separately.