High-speed steel with black oxide treatment that reduces friction between bit and workpiece. Split point starts on contact in metal, wood and plastic; eliminates walking or skating when drilling into metal; 135 deg split point on all bits above 1/8 in ; jobber length.Bit is constructed of M-2 high-speed steel for the excellent combination of strength, heat resistance and wear resistanceBlack oxide coating resists corrosion135 deg split point ensures a true start and eliminates bit walking