C k ratchet crimping pliers for insulated terminals red blue yellow ck tools 430021 designed for the safe and secure crimping of red blue or yellow insulated terminals the c k ratchet crimping pliers feature heavy duty body construction with hardened steel jaws guaranteed for up to 30 000 cycles factory set crimp pressures for the optimum connection safety full cycle ratchet mechanism for safe repeatable results and comfortable ergonomic handles ck tools 430021 ratchet crimping pli