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Size: Length 8" Covers 16 sizes (SAE 5/8 - 3/4") and 10 metric (11mm - 20mm) Grabs bolts on all 6 sides Does not round off corners or strip fasteners Double cushioned grips Loggerhead Tools Bionic Wrench 1/2 inch - 3/4 inch and 12mm- 20mm Metric and SAE Adjustable Wrench The Wrench is a remarkable patented hybrid of an adjustable wrench with the ease of use of a pair of pliers. In addition, the genius of attacking a bolt/nut on all 6 flat sides removes the stress and strain on the corners of the bolt. This, coupled with the superior gripping action of the jaws, allows the user to complete their work without the wrench slipping off and damaging the bolt. The design of the Bionic Wrench multiplies your hand's gripping force, so you can more easily tighten/loosen bolts. You can develop ratchet-like speed by fully turning the Bionic Wrench, release the grip while still on the bolt, reposition wrench, tighten grip-repeat until finished. The Bionic Wrench covers 16 sizes of fasteners from 7/16 to 3/4-inch and from 11 to 20 mm.