Diablo's Magnetic Drive Guide delivers ultimate performance and maximum durability when extending the drills reach in hard to access areas. A high-strength, retractable magnet sleeve provides a secure, anti-wobble grip when fastening screws and nuts. Torque Resistant Design absorbs torque for less stress on the holder and the bit. Diablos Magnetic Drive Guide is Impact Strong, delivering increased shank stability and durability in cordless and corded impact and drill drivers.