The Bosch wood auger is designed to quickly perform precision drilling for through holes, pilot holes for rafter nails, and deep dowel holes in wood in no time. Thanks to the high-performance tip with automatic feed, the drill can fully penetrate, allowing for faster and more precise drilling. The drill's groove geometry, including a solid center, ensures efficient chip removal. Product information: The pilot cutter and the precision-ground main cutting edge ensure exact drill holes, making it ideal for additional formwork, for carpenters and roofers, in soft and hardwood, hexagonal shank system, suitable for all drill drivers with a 13 mm chuck. Technical details: Diameter (D) mm: 12.00, Diameter (D) inches: ¼, Working length (L1) mm: 385, Total length (L2) mm: 450, Wrench size (d) mm: 6.35, Wrench size (d) inches: 1/4.