General description The Irwin IRW10502820 Blue Groove 4X Flat Bit is engineered for efficiency and precision in woodworking. With a patented groove point and cutting edge, this flat bit is designed to cut rather than scrape timber, making it four times faster than standard flat bits. Technical specifications Diameter: 32mm Shank length: 152mm Shank diameter: 10% larger than standard for added durability Increased relief angle: 17° (up from 12°) Usage Optimized for control and removal of wood chips due to its parabolic scoop design.