Knipex 87 Series Cobra Quickset Hightech Water Pump Pliers are made from high-grade vanadium special tool steel, that has been forged and then oil-hardened, for a longer, robust working life. They combine the proven, reliable locking of the hinge bolt with an additional push function which makes it easier to work in very confined and inaccessible areas. The adjustment directly on the workpiece is possible by simply sliding the pliers handle. They offer reliable locking of the hinge bolt with the first workload. The gripping width of the pliers is then 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 again. Available with PVC or Multi-Component grips. Specification Pipe Capacities R = Round H = Hex & Adustments;87 21 250: R: 50mm, H: 46mm, 25 Adjustments87 21 300: R: 70mm, H: 60mm, 25 Adjustments87 22 250: R: 50mm, H: 46mm, 25 Adjustment