50% lighter in weight and a greater gripping capacity (3 1/2″) than comparable pipe wrenches. 11-notch adjustment for a gripping capacity up to 3 �” Thin head and joint area fit into tight places 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 stable gripping Forged box-joint design for very high stability German chrome vanadium electric steel; forged, oil-hardened