SKIL 013-488-SKL Tri Driver Ratcheting Wrench Easy to grip handle Fits SAE and Metric Fasteners SAE - 9/16in, 5/8in, 11/16in, 3/4in, 13/16in, 7/8in, and 15/16in Metric - 14mm, 16mm, 17mm, 19mm, 21mm, 22mm, and 24mm Rotate the ring to tighten on to the bolt