The wrench combines many functions: It replaces metric as imperial a whole set of spanners, can be adjusted very quickly and directly at the workpiece at the touch of a button and continuously packs all gripping widths up to 40 mm or 1 1/2 inch. The joint bolt locks securely in place, which prevents accidental adjustment. The smooth gripping jaws stand in parallel and pack the work piece without damaging edges and sensitive surfaces - work directly on chrome.