IWISS F1807 Copper Ring Crimping Tool Kit for 3/8",1/2",3/4",1" - Free Removal Tool& Pex Pipe Cutter&Gauge- For Sharkbite,Watts,Apollo and All US F1807 Standards Meet ASTM F1807 Standard With Interchangeable jaw set 3/8",1/2",3/4", the tool itself is 1 With Crimp Ring Removal Tool ,which Used To Remove 1/2 to 1 Inch copper ring With Go/No-Go Gauge and spanner Suitable for narrow space and pipe maintenance Tool sets used to fasten PEX pipe to brass or poly fittings using copper crimp rings