Use to remove PEX copper rings safely to Allow you to re-use PEX copper rings, Heavy duty Durable Cast aluminum construction, Very easy to use, the directions are below and there will be a diagram that comes with the tool to help you understand how it works better. Step1: Cut PEX pipe close to the fitting (cutting the tube requires a a PEX pipe cutter) Step2: Insert the small jaw of the tool through the pipe into fitting compress handle, Forcing the cutter through crimp ring Step3: Rotate Fitting and cut through other side of crimp ring, remove crimp ring Step4: Remove remaining pipe.