Auger Bits: Auger Drill Bits look a bit like corkscrews. They have a wide chisel-like cutting edge which lifts the waste from the work piece, and one outer spur which cuts into the timber just in front of the main cutting edge to produce a very clean hole. The deep spiral groove means that waste is removed quickly and the centre screw thread helps the drill to pull itself into the material. They are generally slower than Flat Bits but produce a much cleaner hole, and the length of the spiral means that the hole is more accurate

Available in various sizes.