1/2" Crimprite Ring (10PCS/BAG) has a unique design that aligns the crimp ring over the 2 sealing barbs of Brass Pex Fittings and valves. The lip on the end of the ring allows for perfect crimp alignment every time. Eliminates the sliding and moving of rings during installation. Prevents expensive and frustrating call backs due to leaking, misaligned crimps. They are easy to use as they are used with standard pex crimp tools for installation and can be used on brass or polyalloy fittings, Pex Ready valves ...