Irwin 4X Blue Groove Flat Wood Drill Bit

The 28mm IRWIN® Blue Groove 4X Flat Bit is designed for heavy-duty drilling tasks in timber, ideal for large pipe installations, substantial cable runs, and major construction applications. This diameter provides significant capability for creating clearance holes for large fittings and hardware. The patented groove point and cutting edge technology ensures this 28mm bit cuts cleanly through timber without scraping, producing smooth, professional-quality holes even at this substantial diameter. Operating up to 4 times faster than conventional flat bits, it significantly reduces drilling time on larger holes, dramatically improving productivity. The parabolic scoop efficiently manages wood chip removal whilst maintaining excellent control throughout the drilling process. Engineered with an increased 17° relief angle for superior cutting efficiency and featuring a 152mm shank that's 10% larger in diameter, this bit offers exceptional durability for demanding professional applications. The robust construction resists bending and maintains accuracy even under sustained intensive use, making it suitable for the toughest trade environments.