Diablo's hi-performance screw driving set delivers extreme durability and longer life (50x) in the installation and removal of fasteners. The included drive bits have an optimized tip design to provide a strong, precise grip that reduces wear, stripping and slippage. The magnetic nut setters and drive bit holder are designed with a high-strength, permanent magnet for a secure, anti-wobble grip when fastening screws and nuts. Torque Resistant Design absorbs torque for less stress at the tip. This set is Impact Strong , delivering increased shank stability and durability in cordless and corded impact and drill drivers. Optimized heat treatment process strengthens the bit for impact resistance and stability.