The Bosch Auger Bit is ideal for fast drilling-accuracy when producing through-holes, pre-drilling for rafter nails and drilling deep dowel holes in wood. 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 bits optimised low-friction flute geometry with a solid centre. Optimised scoring spur and precision-ground main cutting edge produce accurate holes, ideal for use in the ancillary building trades, for carpenters and roofers, and is suitable for soft and hard wood. Drill bit has a 14 hex shank system and can be used in all drills with 13mm chuck.