Knipex Alligator. 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 Robust construction, insensitive to dirt 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