IWS-1234C is designed to make copper crimp ring and copper sleeves connections in sizes 1/2-inch to 3/4-inch. The tool set includes PEX crimping tool, PEX cutter,1/2’’ copper crimp ring,3/4’’ copper crimp ring. Patented Copper Crimp Ring: Annealed copper crimp rings are used to secure PEX piping to F1807 Brass.,IWS-1234C is designed to make copper crimp ring and copper sleeves connections in sizes 1/2-inch t