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 handforce required Gripping surfaces with special hardened teeth, teeth hardness approx. 61 HRC: high wear resistance and stable gripping Reliable catching of the hinge bolt: no unintentional shifting Pinch guard prevents operators' fingers being pinched. . Capacity half-moon Capacity in square millimetres Square drive Capacity square Capacity step-like square Capacity triangular Clamping width hexagon Clamping width round Clamping width square Clamping width