Knipex Cobra. 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 hand force required. Gripping surfaces with special hardened teeth, teeth hardness approximately 61 HRC: high wear resistance and stable gripping. Reliable catching of the hinge bolt: no unintentional shifting. Pinch guard prevents operators' fingers from being pinched. Capacity half-moon, capacity in square millimeters, square drive, capacity square, capacity step-like square, capacity triangular, clamping width hexagon, clamping width round, clamping width square.