TUNGSTEN CARBIDE TIP (TCT) Tungsten carbide is approximately twice as stiff as steel, with a Young's modulus of approximately 530–700 GPa (77,000 to 102,000 psi), and has nearly double the density of steel—midway between that of lead and gold. It is comparable to corundum (α-Al₂O₃) in hardness. The tungsten carbide tip is specially designed to cut clean holes in end grain and thin stock, ideal for boring concealed hinges and door locks. CURVED DESIGN The curved design efficiently removes debris and enhances performance during operation. Features: 1. Forstner bit drills clean holes in softwood and hardwood. 2. Equipped with two spurs and a centering point for consistent, clean, and accurate hole cutting. 3. Sharp center spur precisely locates the center of the hole. 4. Drills precise flat-bottom holes without chipping in softwood of any thickness. 5. Suitable for drilling holes in any direction and creating arched openings. Can drill partially overlapping flat-bottom holes for easy mortising. 6. Designed for use with a power drilling machine (not included). Notes: - Drill in a clockwise direction only; not reversible. Begin at low speed and gradually increase. - Avoid breaking or excessive wear on the cutting tips. If damage occurs, resharpen to maintain drilling accuracy and performance. Specification: Product Name: Forstner Bit Material: Tungsten Carbide Tip (HRC 70) & Carbon Steel Body Package Options: - 5 pcs: 15mm, 20mm, 25mm, 30mm, 35mm - 11 pcs: 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm Size Chart: | Size (D) mm | Overall Length (L1) mm | Shank Dia. (d) mm | Shank Type | Shank Length (L2) mm | Cutting Depth Max. mm | |-------------|------------------------|-------------------|------------|------------------------|------------------------| | 15–25 | 80 | 8 | Round | 22 | 55 | | 26–35 | 80 | 8 | Round | 22 | 55 | | 38–45 | 80 | 9 | Round | 22 | 55 | | 48–55 | 80 | 8 or 9 | Round | 22 | 55 | | 60–65 | 80 | 9 | Round/Hex | 22 | 55 | | 70–100 | 80 | 8 | Hex | 22 | 55 | Our products are made with high-quality materials and designed for reliable performance. Please refer to the size and specifications to ensure compatibility with your project requirements. We aim to provide detailed product information to support your purchase decision. For any questions regarding the product, feel free to reach out through Amazon messaging. Thank you for choosing this product.