Diablo 54-Piece Impact Screwdriver Bit SetExtreme durability and impact resistance for up to 50X longer life versus standard drive bits Optimized bit tip design reduces wear, minimizes breakage and prevents slippage Magnetic nut setters and drive bit holder includes a permanent magnet to eliminate wobbling by securely gripping screws and hex nuts Torque Resistant Design for less stress on the bits tip and the bit holder Optimized tip design reduces wear, minimizes breakage and prevents