Steel Multi-Head Copper Crimp ToolZurn's multi head crimping tool allows for quick installation of the copper crimp ring in varying sized jaws for 3 8", 1 2", 5 8", and 3 4" connections, also comes with remover tool. California residents see Prop 65 WARNINGS For use with traditional copper crimp rings, and QickCap copper crimp rings with positioning end cap Durable construction stands up to tough environments Used in potable plumbing systems High temp and freeze resistant materials