IWISS F1807 PEX Pipe Crimping Tool Kit for 3/8",1/2",3/4",1" Copper Ring with Free Gauge&Pex Pipe Cutter for Sharkbite,Watts,Apollo and All US F1807 Standards &hellip; Meet ASTM F1807 Standard The tool is 1-inch, come with three changeable jaws 3/8",1/2",3/4" With Comfort Grips Minimizes User Fatigue Used to fasten PEX pipe to brass or poly fittings using copper crimp rings Suits Sharkbite, Watts, Apollo and All US F1807 Standard