Knipex adjustable pliersAtramentised gray pliers, clean head, non-slip plastic coated handles. FAST ADJUSTMENT AND ACCURATE PRESSURE BY THE BUTTON DIRECTLY ON THE WORKING PART. Fine adjustment allows adaptation to the pieces to tighten even in the most various forms and helps to find the optimal position of the handles for the hand. Self-locking on hoses and nuts: no slipping on the workpiece to tighten. Surfaces of the jaws with treated with a special tempering toothing, the hardness of teeth approx. 61 HRC: grip with high wear resistance. Passing joint: high stability thanks to the double guide. Secure click hinge pin: no unintentional shifting adjustment. With contrast lock to prevent accidental crushing. Chrome vanadium steel, forged, oil termpered.