Pipe and water pump pliers in one tool, self-clamping on pipes and nuts: no slipping off the workpiece, energy-saving work, fast, precise adjustment directly on the workpiece, no unintentional adjustment, no slipping of the joint, fine adjustment, optimal leverage, can be used as a wrench in many situations , gripping surfaces with specially hardened teeth, hardness of the teeth approx. 61 HRC: permanently secure gripping due to high wear resistance, chrome vanadium electric steel, forged, oil-hardened in several stages