Irwin 4X Blue Groove Flat Wood Drill Bit

The 30mm IRWIN® Blue Groove 4X Flat Bit is a substantial size ideal for major construction applications in timber, perfect for large waste pipe installations, significant cable bundles, and heavy-duty structural work. This diameter is frequently specified for creating clearance holes for 32mm waste pipe and similar large fittings. Featuring the patented groove point and cutting edge design, this 30mm bit cuts through timber cleanly and efficiently without scraping, ensuring professional results even at this larger diameter. The advanced technology delivers speeds up to 4 times faster than standard flat bits, dramatically improving productivity on substantial drilling operations. The parabolic scoop provides superior chip removal and maintains excellent control, particularly important when working with this more substantial size. With an increased relief angle of 17° for enhanced cutting performance and a robust 152mm shank manufactured 10% larger in diameter, this bit is built for demanding professional applications. The strengthened construction resists bending and maintains accuracy even under sustained intensive use, making it a reliable choice for trade professionals.