Carbon steel, hardened and tempered and coated with titanium nitride for longer life. For use with power and hand drills. Presented in soft grip case. Features and Benefits • Contents: 10, 12, 16, 19, 22, 25 and 32mm • Carbon steel hardened and tempered coated with titanium Nitride for longer life Contents 7 x Flat wood drill bits: 10, 12, 16, 19, 22, 25, 32mm