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. MINMIZES STRIPPED FASTENERS - Recessed corners for driving on flats FASTENER RETENTION - Industrial strength rare earth magnet to secure fasteners IMPACT READY - 1/4" hex shank rated for use in impact drivers and drills. BUILT TO LAST - Part of the DEWALT ELITE SERIES lineup.