IRWIN Blue Groove 4X Long Flat Bit, 20mm x 400mm
IRWIN 20x400mm flat bit cuts timber 4x faster with patented groove tech. Extended shank for deep drilling. Ideal for woodworking.
The IRWIN Blue Groove 4X Long Flat Bit features a patented groove point and cutting edge designed for efficient timber cutting, offering up to 4 times faster performance compared to standard flat bits. Its innovative design cuts rather than scrapes, reducing clogging and ensuring smoother operation. The parabolic scoop enhances control and wood chip removal, making it ideal for dust-free applications.
This long series bit has an increased relief angle from 12° to 17°, improving cutting efficiency and reducing friction. The shank is 400mm in length, providing extended reach for deep-drilling applications, and is 10% larger in diameter for added strength and durability. Whether you're a professional tradesperson or a DIY enthusiast, this flat bit delivers precision, speed, and reliability for woodworking projects.
Key Features:
- Patented groove point for fast, efficient cutting
- Cuts timber 4 times faster than standard flat bits
- Parabolic scoop design for better chip removal
- Increased relief angle (17°) for improved cutting efficiency
- Extended 400mm shank for deep drilling
- 10% larger shank diameter for enhanced durability
- Ideal for woodworking and carpentry tasks
Specified Measurements:
- Bit Size: 20mm diameter
- Shank Length: 400mm
Perfect for joinery, cabinet-making, and general woodwork, the IRWIN Blue Groove 4X Long Flat Bit ensures clean, precise, and fast drilling every time.
- Woodworking projects
- Joinery & carpentry
- Cabinetry & furniture making
- General construction drilling in wood
- **Cutting Design:** Patented groove point & cutting edge
- **Performance:** Cuts 4x faster than standard flat bits
- **Chip Removal:** Parabolic scoop design
- **Relief Angle:** 17° (increased from 12°)
- **Shank Length:** 400mm
- **Shank Diameter:** 10% larger for durability
- **Bit Diameter:** 20mm
- **Weight:** 218g
Always follow local regulations and product guidance.
Free standard delivery on US mainland orders. Express delivery options and international shipping available at checkout.
We offer a 30-day money-back guarantee on most products. For defective items, contact us within 14 days for a replacement or refund.
View Full Delivery & Returns PolicySecure Transactions
We take the utmost care with your payment and personal details. Our website uses advanced encryption technology, including Secure Sockets Layer (SSL), to protect your information during transmission. You can verify a secure connection by looking for 'https' and a locked padlock in your browser.
Cookie Policy
Cookies enhance your shopping experience by keeping track of your cart and remembering you when you return. We also use banner advertising based on your browsing history to present products of potential interest.
Security Warning
Beware of phishing scams! We will never ask for personal details via email. If such information is required, we'll ask you to contact us by phone. If you receive an email requesting sensitive information, do not respond and let us know immediately.
