KNIPEX 87 21 250 Cobra Quick Set Water Pump Pliers Adjustment on the workpiece by simply sliding the pliers handle - push, open, slide up and stays set Self-locking on pipes and nuts: no slipping on the workpiece and low hand force required Push button feature adjusts pliers once and stays set allowing user to access 25 adjustment positions for optimum adaption to different sizes of workpieces Good access to the workpiece due to the Slim size of the head and joint area with a Working capacity of 2" Gripping surfaces with special hardened teeth (approx. 61 HRC) for wear resistance and long life, German chrome vanadium electric steel, forged, Oil hardened and grips any shaped object