The Channellock 15" Chrome Vanadium Steel Adjustable Wrench is designed with longer jaws grip that better and thinner jaws to give greater access in tight spaces. 4 thread knurl & non-protruding jaws provide greater capacity; minimal head width improves performance in confined spaces. Measurement scales (in. on front mm. on reverse) are handy for sizing nuts, pipe and tube diameters. Greater jaw capacity supports larger nuts and bolts.