TUNGSTEN CARBIDE TIP (TCT) Tungsten carbide is approximately twice as stiff as steel, with a Young's modulus of approximately 530700 GPa (77,000 to 102,000 psi), and is double the density of steelnearly midway between that of lead and gold. It is comparable with corundum (-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.DESIGN WITH CURVE The curved design efficiently removes debris and enhances performance during operation.Features: 1. Forstner bit drills clean holes in soft and hardwood. 2. Two spurs and a centering point ensure repeated, clean, and accurate hole cutting. 3. The sharp center spur accurately 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.Important Notes: 1. The Forstner drill bit is designed for clockwise rotation only and is not reversible. Begin drilling at low speed and gradually increase. 2. Avoid breaking the cutting edges. If damage occurs, resharpen the tip to maintain drilling accuracy and quality.Specification: Product Name: Forstner Bit Material: Tungsten Carbide Tip (HRC 70) & Carbon Steel Body Package Options: 5 pcs set: 15mm, 20mm, 25mm, 30mm, 35mm 11 pcs set: 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mmSize Chart: | Size (D) mm | Overall Length (L1) mm | Shank Dia. (d) mm | Shank Type | Shank Length (L2) mm | Cutting Depth Max. mm | |-------------|------------------------|-------------------|------------|------------------------|------------------------| | 1525 | 80 | 8 | Round | 22 | 55 | | 2635 | 80 | 8 | Round | 22 | 55 | | 3845 | 80 | 9 | Round | 22 | 55 | | 4855 | 80 | 8 or 9 | Round | 22 | 55 | | 6065 | 80 | 9 | Round/Hex | 22 | 55 | | 70100 | 80 | 8 | Hex | 22 | 55 |Our products are made with high-quality materials and designed for reliable performance and durability. We aim to provide detailed product information in the title and description to help you make an informed purchase decision. If you have any questions about the product, feel free to reach out for assistance.