Adjustment at the push of a button directly on the workpiece: quick and easy handling, fine adjustment: enables optimal adjustment to a wide variety of workpiece sizes and a hand-friendly grip position, number of adjustment positions see table, secure engagement of the hinge pin: no unintentional adjustment, push-through joint: high stability thanks to double guides, self-locking on pipes and nuts: no slipping on the workpiece, energy-saving work, gripping surfaces with specially hardened teeth, hardness of the teeth approx. 61 HRC: permanently secure gripping due to high wear resistance, one-hand adjustment. Pinch protection prevents crush injuries, favorable leverage: optimal power transmission, chrome vanadium electric steel, forged, multi-stage oil-hardened