IRWIN Blue Groove 4X Long Flat Bit 16mm x 400mm

The IRWIN Blue Groove 4X Long Flat Bit is engineered for precision and efficiency in wood drilling applications. Featuring a patented groove point and cutting edge, this bit is designed to cut cleanly through timber 4 times faster than standard flat bits—eliminating the scraping effect typical of traditional designs.

Key to its performance is the parabolic scoop, which enhances control and optimises wood chip removal, reducing clogging and improving workflow efficiency. The 17° relief angle (up from the standard 12°) ensures smoother operation and extended bit life, reducing resistance and heat build-up.

Constructed for durability, the 400mm-long shank has a 10% larger diameter than conventional bits, providing added strength for demanding tasks. Ideal for deep drilling in timber, this bit is suitable for professional carpenters, joiners, and DIY enthusiasts alike.

Includes: 1 x IRWIN Blue Groove 4X Long Flat Bit (16mm diameter, 400mm length).