This drill bit has a hexagonal shank system and works with all drill drivers with a 13-mm chuck. The Auger Bit is ideal for fast drilling-accuracy when producing through-holes, pre-drilling for rafter nails and drilling deep dowel holes in wood. The heavy-duty self-feeding tip pulls the bit through completely, which allows for quick and effortless precision-drilling. Straight holes and a high chip removal rate and increased speed are made possible by the bit's optimised low-friction flute geometry with a solid centre. Its optimised scoring spur and precision-ground main cutting edge produce accurate holes. It is ideal for use in the ancillary building trades, for carpenters and roofers, and is suitable for soft and hard wood