Diablo Auger Bit, 2-Step, 1/2 in Dia, Flute Type: Deep, Shank Type: Hex, Shank Diameter: 10 mm, Point Type: Self-Feed, Cutting Edge Material: Carbide, 7-1/2 in OAL, Applicable Materials: Concrete, Wood, Suitable for: Cordless and Corded Impact and Drill Drivers