Knipex Cobra Quickset Water Pump Pliers are made from high-grade vanadium special tool steel, forged and oil-hardened for a long, robust working life. They combine the proven, reliable locking of the hinge bolt with an additional push function for easier work in confined areas. The adjustment directly on the workpiece is possible by sliding the pliers handle. They offer reliable locking of the hinge bolt with the first workload. The gripping width is fixed and can only be adjusted by pressing the button. To re-activate the sliding function, the hinge bolt must be released by pressing the push button and the pliers must be completely opened. Available with PVC or Multi-Component grips. Specifications Pipe Capacities R = Round, H = Hex Adjustments; 87 21 250: R: 50mm, H: 46mm, 25 Adjustments; 87 21 300: R: 70mm, H: 60mm, 25 Adjustments; 87 22 250: R: 50mm, H: 46mm, 25 Adjustments.