Push the button for adjustment on the workpiece Fine adjustment for optimum adaptation to different sizes of workpieces and a comfortable handle width Self-clamping on pipes and nuts: no slipping on the workpiece, effortless working Gripping surfaces with special hardened teeth, teeth hardness approx. 61 HRC: high wear resistance and stable gripping Box-joint design for high stability due to double guide, Weight: 0.4188782978 pounds, Manufacturer: Knipex