The DEWALT Extreme Impact Torsion hardened Pozidriv screwdriver bits have a durable hex shank to fit all impact drivers. These bits feature a 15 reflex core, designed to withstand the high torque loads of impacts, flexing to absorb the extra force. A precision-machined tip provides an ideal fit in screw recesses, which reduces stripping of screw heads and a heat treated body for increased durability. Features: The 15 torsion zone allows the screw driver bit to flex rather than breaking. The Full Fit head prevents the rounding of the screw head and prevents 'cam out' (bit head slipping out of screw head due to the turning force). The Magnetic Screwlock enables tasks to be completed quicker and easier, reducing instances of dropped or lost screws.