The irwin blue groove 4x flat bit delivers professional-grade drilling performance engineered for timber applications. Featuring a patented groove point and cutting edge, this 18mm flat bit cuts rather than scrapes, ensuring clean, efficient bore holes. The parabolic scoop design optimises chip removal and drilling control throughout operation. An increased relief angle from 12 to 17 improves cutting efficiency, while the 4x speed advantage significantly reduces drilling time compared to standard flat bits. The 152mm shank features a 10% larger diameter for superior durability and stability during demanding drilling tasks. This professional-grade flat bit delivers reliable performance across carpentry, joinery and construction applications. Features & benefits: patented groove point and cutting edge for clean cutting rather than scraping timber. 4 Times faster drilling performance than standard flat bits. Parabolic scoop design for optimised chip removal and drilling control. Increased relief angle from 12 to 17 for improved cutting efficiency. 152Mm shank with 10% larger diameter for superior durability and stability. Ideal for carpentry, joinery, construction and professional timber drilling applications. Bit diameter: 18mm. Shank length: 152mm.