Greater 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 and reliable gripping. Box-joint design: high stability because of double guide. Pinch guard prevents operators' fingers being pinched. 27 adjustment positions. Chrome vanadium electric steel; forged, multi-stage oil-hardened.