Knipex Cobra® XL Water Pump Pliers 16" 87 01 400 USGreater gripping capacity and lighter weight than comparable pipe wrenches. Fast push button adjustment directly on the workpiece, no unintentional slipping of the joint. Fine adjustment for optimum adaptation to different size workpieces and a comfortable gripping position. Self locking on pipes and nuts: no slipping off the workpiece and low hand force required. Gripping surfaces with special hardened teeth, teeth hardness (approx. 61 HRC): low wear