Sutton S132 Magnetic nutsetters are used to drive hex head nuts and screws in a wide variety of applications. Sutton tools supabit extreme impact bits - Certified heavy hitters specifically developed for use with the high-torque output of an impact driver. Hex opening: used to drive hex head nuts and screws. 1/4" Hex shank with power groove for use in impact drivers and quick change adapters. Size: 1/4". Length: 65mm.