Adjustment by shifting the jaw directly on to the workpiece: fast, secure and comfortable handling. Opening at the touch of a button. Fine adjustment for optimum adaptation to different workpiece sizes and comfortable gripping position. Good access to the workpiece due to slim size in the head and joint area. Self-locking on pipes and nuts: no slipping on the workpiece and low handforce 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. Chrome vanadium electric steel, forged, oil-hardened.