Replaces a full set of inch and metric open end wrenches up to 1 1/2" (40 mm). Smooth jaws for damage free installation of plated fittings - working directly on chrome. Adjustable tightening tool. Excellent for gripping, holding, pressing and bending applications. Zero backlash jaw surface pressure prevents damage to edges of sensitive components. 15 adjustment positions at the touch of a button directly on the workpiece. Laser-etched scale allows the wrench opening to be set before gripping onto workpiece - 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. Chrome vanadium electric steel; forged, oil-hardened.