The Crescent Self-Adjusting Pipe Wrench features a unique head design that instantly grips and releases pipes and other types of fasteners with a fast ratcheting action. It is ideal for most surfaces including black iron, galvanized, PVC, and copper pipes, as well as nuts, bolts, and couplings. The spring-loaded head features a quick-grip and quick-release function that allows the wrench to be used with one hand.