The auger bits in this Faithfull 8 Piece Combination Auger Bit Set can be used in either a hand or power drill at low speeds. Machined from high-quality carbon steel, they feature a pitched screw point for accurate starting with a wide flat spiral for improved stability, straight tracking and fast waste removal. Augers may be used in timber, plywood, MDF and block wood and can be resharpened using a hand file.