The Irwin Blue Groove 4X Flat Bit range is engineered for high-speed, precision drilling across wood and composite materials. Featuring Irwin’s patented Blue Groove design and self-feeding screw tips, these bits deliver up to 4x faster performance than standard spade bits. Available in sizes from 6mm to 40mm, each variant offers clean entry, reduced breakout, and extended reach—ideal for electricians, joiners, and site professionals. Whether boring through joists, studs, or sheet materials, this range ensures reliable, efficient results across all timber types.

6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, 32mm, 35mm, 38mm, 40mm
All sizes feature a 152mm shank and Blue Groove cutting geometry.