DEWALT ELITE SERIES Nut Drivers feature rounded corners, minimizing stripped fasteners by driving on the flats. The rare earth magnet holds the fastener securely in place. Each nut driver features a 1/4" hex shank rated for use in impact drivers and drill drivers. 5PC SET- Includes 1/4", 5/16", 3/8", 7/16", and 1/2" nut drivers