Robust construction; particularly suitable for outdoor work. Good access to the workpiece due to slim size in the head and joint area. Pinch guard prevents operators' fingers being pinched. Gripping surfaces with special hardened teeth, teeth hardness approx. 61 HRC: low wear and reliable gripping. Self-locking on pipes and nuts: no slipping off the workpiece and low hand force required. Box-joint design: high stability because of double guide. 11-notch adjustment positioning with optimized adjustment to the workpiece and user-friendly handle position. Chrome vanadium electric steel; forged, multi stage oil-hardened.