TUNGSTEN CARBIDE TIP (TCT) Tungsten carbide is about twice as rigid as steel, with Young's modulus around 530700 GPa (77,000 to 102,000 psi), and has double the density of steel��almost between that of lead and gold. It possesses hardness comparable to corundum (-Al2O3). The tungsten carbide tip is specifically crafted to create clean holes in end grain and thin stock, making it ideal for boring concealed hinges and door locks. DESIGN WITH CURVE In designs featuring curves, the head effectively removes debris while ensuring efficiency. Features 1. The Forstner Bit drills clean holes in both soft and hardwood. 2. Equipped with two spurs and a centering point, it offers the perfect solution for repeated, clean, and accurate hole cutting every time. 3. The sharp center spur precisely locates the hole's center. 4. It is perfect for drilling precise flat-bottom holes without chipping any thickness of soft wood. 5. Suitable for drilling holes in any direction and creating arched openings, as well as drilling partially overlapped flat-bottom holes for easy mortising. 6. Best used with a power drilling machine (not included). Please Note: 1. The Forstner drill bit is designed for clockwise drilling only, not reversible; speeds should increase gradually from low to high. 2. Regularly grind the tool nose and tips to prevent wear and damage, as neglect may lead to a significant decrease in accuracy and quality when drilling after the tips break. Specification: Product Name: Forstner Bit Material: Tungsten Carbide Tip (HRC.70) & Carbon Steel Body Package: 5pcs = 15mm, 20mm, 25mm, 30mm, 35mm 11pcs = 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm Size Chart: Size (D) | Overall Length (L1) | Shank Dia. (d) | Shank Type | Shank Length (L1) | Cutting Depth Max. 15 | 80 | 8 | Round | 22 | 55 16 | 80 | 8 | Round | 22 | 55 17 | 80 | 8 | Round | 22 | 55 18 | 80 | 8 | Round | 22 | 55 19 | 80 | 8 | Round | 22 | 55 20 | 80 | 8 | Round | 22 | 55 21 | 80 | 8 | Round | 22 | 55 22 | 80 | 8 | Round | 22 | 55 23 | 80 | 8 | Round | 22 | 55 24 | 80 | 8 | Round | 22 | 55 25 | 80 | 8 | Round | 22 | 55 26 | 80 | 8 | Round | 22 | 55 28 | 80 | 8 | Round | 22 | 55 30 | 80 | 8 | Round | 22 | 55 32 | 80 | 8 | Round | 22 | 55 35 | 80 | 8 | Round | 22 | 55 38 | 80 | 8 | Round | 22 | 55 40 | 80 | 9 | Round | 22 | 55 42 | 80 | 9 | Round | 22 | 55 45 | 80 | 9 | Round | 22 | 55 48 | 80 | 8 | Round | 22 | 55 50 | 80 | 9 | Round | 22 | 55 53 | 80 | 9 | Round | 22 | 55 55 | 80 | 9 | Round | 22 | 55 60 | 80 | 9 | Round | 22 | 55 65 | 80 | 8 | Hex | 22 | 55 70 | 80 | 8 | Hex | 22 | 55 75 | 80 | 8 | Hex | 22 | 55 80 | 80 | 8 | Hex | 22 | 55 85 | 80 | 8 | Hex | 22 | 55 90 | 80 | 8 | Hex | 22 | 55 95 | 80 | 8 | Hex | 22 | 55 100 | 80 | 8 | Hex | 22 | 55 Our products are crafted using high-quality materials and designed to ensure an optimal user experience. We aim to ship all orders within three days of purchase, with an estimated delivery time of 8-15 days. When purchasing, please pay attention to the size and dimensions of the product to ensure it meets your requirements. Detailed information about the product features and specifications is provided in the title and description. We want you to be fully satisfied with your purchase. If you have any questions or concerns, please feel free to reach out. We are here to assist you. Thank you for choosing our product. We hope you enjoy it!