The 1212055, also known as CRIMPFOX-RCI 1, is a set of crimping pliers for terminating insulated cable lugs. It produces a consistent oval crimp and supports a wire cross-section range from 0.14 mm² to 1.0 mm² (AWG 26-18) across three distinct, color-coded crimping positions. The tool features an integrated, unlockable pressure lock that ensures the required crimping pressure is reached before releasing, guaranteeing a secure connection. These features make it a reliable tool for professional electrical installations where consistent and correct crimping of insulated lugs is required.