The DEWALT 31-Piece MAXFIT screw driving set is the perfect way to maximize your DEWALT power tool system. Featuring the 10X Magnetic Screw Lock System, the MAXFIT bits are ideal for use in impact drivers and drill/drivers. Each bit features a precision-machined tip for ideal fit in screw head recesses, resulting in less stripped screws. The Magnetic Screw Lock System sleeve features a floating ring magnet for fastener retention.