Offer 9 adjustment positioning for 30% more gripping capacity. Good access to the workpiece due to slim size in the head and joint area. Self-locking on pipes and nuts: no slipping. Low handforce required. Gripping surfaces with special hardened teeth, teeth hardness approx. 61 HRC. Box-joint design: high stability due to double guide. Robust construction- particularly suitable for outdoor work. Pinch guard prevents fingers being pinched. Chrome vanadium electric steel, forged, oil-hardened.