The award winning Bionic Wrench from Loggerhead Tools is a premium quality product that replaces 14 spanner sizes! The Bionic wrench defines a new class of adjustable wrenches with patented gripping technology that focuses all the pressure on the flats & not the corners. This tool is a remarkable patented hybrid of an adjustable wrench with the ease of use of a pair of pliers. The design of the Bionic Wrench multiplies your hand's gripping force so you can more easily tighten/loosen bolts. Sizes covered: 12mm 13mm 14mm 15mm 16mm 17mm 18mm 19mm 20mm & 1/2" 9/16" 5/8" 11/16" 3/4”.