Sutton Tools Auger Bits are designed for fast cutting through holes in timber such as fence posts and railway sleepers. Suitable for kiln dried timber hardwood, softwood, MDF and particle boards. Not suitable for green sap woods. Single-Spur cutting edge scribes the circumference of the hole for a smoother finish, Coarse screw point draws the bit into the work piece providing fast drilling in hard and soft woods, Solid core design with wide lands provide extra rigidity while drilling, Hex shank for positive grip, preventing slippage in chuck, Made from alloy steel,