This Silverline Long Auger Drill Bit Set is designed for fast, clean drilling into various types of wood, including hardwood, softwood, MDF, and chipboard. The set includes four 600mm drill bits in sizes 8, 12, 16, and 24mm. They are constructed from hardened high carbon steel for durability and feature a hex shank for a secure fit in drill chucks. The bits have a threaded centre point for easier starting and greater accuracy, and a machined flute for efficient waste removal, maximizing drilling speed and performance. Ideal for drilling through beams, joists, and door frames.