Knipex Cobra. Press the button to adjust to the workpiece. Fine adjustment for optimal adaptation to different sizes of workpieces and a comfortable grip width. Self-locking on pipes and screws: no slipping on the workpiece and minimal hand force required. Gripping surfaces with specially hardened teeth, tooth hardness approx. 61 HRC: high wear resistance and stable grip. Reliable catching of the hinge pin: no unintentional slipping. Crushing protection prevents pinching of the operator's fingers. Capacity for half-moon, capacity in square millimeters, square drive, capacity square, capacity stepwise square, capacity triangular, clamping width hexagonal, clamping width round, clamping width square.