Replaces a full set of inch and metric open end wrenches up to 3 3/8" (85 mm). Excellent for gripping, holding, pressing and bending applications. Optimized adjustment to the workpiece with hand-friendly position of grips. Reliable catching of the hinge bolt: no unintentional shifting. Lever transmission greater than 10-1 for strong gripping power. Adjustable tightening tool. Replaces diverse, expensive, large open end wrenches up to 3 3/8". Parallel jaws allow infinitely variable gripping of all widths to the specified maximum size. Smooth jaws for gentle installation of quality union joints made from brass or stainless steel. Zero backlash jaw surface pressure prevents damage to edges of sensitive components. 25 adjustment positions at the touch of a button directly on the workpiece. The action of the jaws allows bolted connections to be tightened and released quickly using the ratchet principle. Chrome vanadium electric steel; forged, oil-hardened.