Crimps RA, RB, RC Nylon and vinyl terminals, splices and disconnects. Color coded die nests include A (22-18AWG), B (16-14AWG), and C (12-10AWG) which include integrity dots that are embossed on the top and bottom of the terminal for easy visual verification of crimps. The toggle action of the tool increases mechanical gain which dramatically reduces handle force, and the stress on your hands. The Shure-StakeTM mechanism helps to ensure a complete crimp cycle before it releases the tool.