Rhino Tool's Ratchet Quick Change Crimper with H1 die for spark plug terminals Save money by making your own custom ignition leads Suitable for 7, 8 and 8.5mm ignition lead cable There are more than 30 different dies available to suit this crimper AISI 4140 DIES AISI 4140 is a chromium-molybdenum alloy steel. The chromium content provides good hardness penetration, and the molybdenum content ensures uniform hardness and high strength. The dies are heat treated (HRC43°~45°) and have a zinc phosphate surface treatment Any other Quick Change dies can be used with this crimping tool. More than 30 different dies are available No tools required. The dies can be replaced in 5 seconds. Slide in, slide out Patented in USA, Germany, China, Taiwan