DEWALT DWPVTDRV 4-Piece IMpact Ready Magnetic Nut Driver Set Product designed for use in Impact Drivers and Wrenches Recessed Corners = Drives on flats which minimzes shavings Indrustrial strength magnet maximizes fastener retention Pivoting product pivots up to 20 degrees allowing one to get into tight spaces or corners Extra-strength magnet for superior bit retention