Greater gripping capacity but much lower weight than comparable pipe wrenches. Fast push-button adjustment directly on the work piece, no unintentional slipping of the joint. Fine adjustment for optimum adaptation to different sizes of work pieces and a comfortable handle width. Self-locking on pipes and nuts, no slipping on the work piece and low hand force required. Gripping surfaces with special hardened teeth, teeth hardness approximate 61 HRC. High wear resistance and stable gripping. Box-joint design, high stability due to double guide. Guard prevents operators fingers being pinched. Chrome vanadium electric steel, forged, oil-hardened.