Irwin Blue Groove 4X Flat Bits The Irwin Blue Groove 4X Flat Bits, available at Trade Counter Direct, are engineered for rapid and efficient wood drilling. Designed for professional use, these flat bits feature advanced cutting technology to deliver superior performance and durability when working with timber. With a patented groove point and optimised chip removal, the Irwin Blue Groove 4X range ensures precise, clean holes while maintaining control and reducing effort. Their robust construction and innovative design make them a reliable choice for demanding trade applications. Features Patented groove point and cutting edge for fast, efficient drilling Cuts timber up to four times faster than standard flat bits Parabolic scoop design optimises control and wood chip removal Increased relief angle from 12° to 17° for improved cutting action Large shank diameter for enhanced durability and reduced breakage risk Shank length of 152 mm for extended reach Specifications Range/Series Blue Groove 4X Shank Length 152 mm Relief Angle 17° (increased from 12°) Shank Diameter 10% larger than standard Material Suitable for timber