Knipex tools 87 51 250 SBA pliers wrench: a one-of-a kind tool that replaces a full set of inch and metric open end wrenches. Excellent for gripping, holding, pressing and bending applications. Smooth parallel gripping jaw prevents marring on work surfaces. Adjustment at the touch of a button. Zero backlash contact pressure with no damage to edges. Has 13 adjustment positions to adjust to hex nuts up to 1 3/8-Inch. Laser marked adjustment scale to set the opening width before use - Metric and inch markings. Parallel jaws allow infinitely variable gripping of all widths to the specified maximum size. Reliable catching of the hinge bolt: no unintentional shifting. The action of the jaws allows bolted connections to be tightened and released quickly using the ratchet principle. Lever transmission greater than 10-1 for strong gripping power. With narrow gripping jaws - for fastening/loosening situations requiring a slim tool. Chrome vanadium electric steel; forged, oil-hardened.