The Knipex 85 Series Spring Hose Clamp Pliers are made from Chrome vanadium, forged, oil-hardened electric steel. They are fitted with rotatable, universal grip inserts for reliably gripping the clamps in all positions. These clamps offer extremely good leverage which allows clamps to be opened easily without great effort. With its slim head design, narrow head width and rotatable grip inserts, it is an ideal tool, especially in confined areas. Can be used for standard, space-saving, spring wire hose clamps and for spring band clamps up to 70mm nominal size. 85 51 250 A Quick-Set Adjustment. 85 51 250 AF Locking Device, One Hand Release. Specification Length 250mm. Capacity 70mm. The Knipex 85 51 250 AF Spring Hose Clamp Pliers have a locking device that enables simple and secure work on clamps under tension without effort and has a one-hand release.