Draper Knipex Cobra® 87 21 250 Quickset Waterpump Pliers, - 87 21 250Professional Quality, manufactured from chrome vanadium steel, oil hardened and tempered, with smoothly ground jaw edges and joint faces. The gripping surfaces have specially hardened teeth to 61HRC for positive grip on pipes and nuts. One handed adjustment directly on the workpiece is possible by simply sliding the plier handles. Display packed. Manufactured to DIN 5231 Specifications Key Features Professional quality construction from durable chrome