Push the button for adjustment on the workpiece.Fine adjustment for optimum adaptation to different sizes of workpieces and a comfortable handle width.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: high wear resistance and stable gripping.Box-joint design for high stability due to double guide.Reliable catching of the hinge bolt: no unintentional shifting.Pinch guard prevents operators' fingers being pinched.....