Bosch SBID32 Impact Tough Screwdriving Bit Sets, 32 PieceDesigned to withstand the torque generated by today's high powered impact drivers. Forged tip bits to reduce breakage. Torsion zone absorbs torque peaks reducing stress and the tip. Hardened core increases bit strength. Engineered for high torque applications. Black Oxide coating resists corrosion. Highlights: 32 piece set Impact tough Forged tip bits to reduce breakage Torsion zone absorbs torque peaks reducing stress at the tip Hardened core