Knipex Cobra® Water Pump Pliers, 180 mm Overall, Flat, Straight Tip, 36mm Jaw Non-slip PVC coating - Ergonomic handles - Max. opening 36mm 18 adjustment positions Adjustment on the workpiece by simply pressing the button Precise adjustment for perfect fit to different workpiece sizes and ergonomic handles Self-locking on pipes and nuts: no slipping on the workpiece, less effort required Specially hardened jaws with teeth on the inside, hardness approx. 61 HRC: secure Pliering due to high wear resistance Interlocking hinge: high stability due to double guidance Safe latching of the hinge pin: no accidental adjustment Protective lug to prevent pinching   Chrome vanadium electrical steel, forged, oil-hardened in several stages   Standards DIN5231D