The T3681A Crimping Tool by CK Tools is a professional-grade hand tool specifically designed for crimping terminals, cartridge connectors, and insulated and non-insulated ferrules. Its pliers-style construction features a textured handle with a self-adjusting ratchet mechanism for controlled and precise crimping, and the hardened steel dies deliver superior performance. The T3681A is designed to be used with a variety of size crimp terminals, and its smooth mechanism ensures an exact crimp every time.