The new CrimpAll tool by Watts crimps four sizes of PEX pipe. This versatile new tool crimps 3/8", 1/2 ", 5/8", and 3/4" HydroPEX fittings. The complete PEX Tool kit includes the CrimpAll tool with four jaw set sizes, rugged tool case, adjustment tools, and a "go/no-go" gauge. This tool uses the Black Copper rings in combination with HydroPEX fittings to make connections. For 1" Crimp Connections the 1" Crimp tool may be used with 1" Crimp rings.