These shut-off tools, designed just for PEX, work on both ½” and ¾” diameter PEX. The SSPEX1 PEX shut-off tool allows the user to quickly seal off PEX tubing in an emergency, or to replace a faulty valve. Front end features a snap hinge that can be taken apart quickly to allow work in confined areas. Open end has one wingnut to secure tool closed until repair is done. Knurled grip catches and holds the pipe. The compact design of SSPEX2 PEX shut-off tool allows the user to reach into difficult locations to seal off PEX tubing.