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 - no damage to edges. Has 19 adjustment positions to adjust to hex nuts up to 2". Laser marked adjustment scale to set the opening width before use - metric and inch markings.