TUNGSTEN CARBIDE TIP (TCT) Tungsten carbide is approximately twice as stiff as steel, with a Young's modulus of around 530700 GPa (77,000 to 102,000 psi), and has double the density of steel, sitting nearly midway between that of lead and gold. It is comparable to corundum (-Al2O3) in terms of hardness. The tungsten carbide tip is specifically crafted to cut through holes smoothly in end grain and thin materials, making it ideal for boring concealed hinges and door locks. DESIGN WITH CURVE In a design featuring curves, the head effectively removes debris while operating efficiently. Features 1. This drill bit creates clean holes in both soft and hardwood. 2. It includes two spurs and a centering point, providing an excellent solution for repeatedly achieving clean and precise hole cuts. 3. The sharp center spur accurately identifies the center of your hole. 4. This bit is suitable for drilling precise flat bottom holes without chipping in any thickness of softwood. 5. It can drill holes in any direction and create arched openings, as well as drill partially overlapped flat bottom holes for easy mortising. 6. It should be used with a power drilling machine; machine not included. Please Note: 1. While drilling holes, this drill bit operates only in a clockwise direction and is not reversible; speeds should transition gradually from low to high. 2. To maintain accuracy and quality during drilling, please sharpen the tool nose and tips regularly to prevent wear and damage, as breaks can lead to a significant decrease in performance. 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. mm mm mm mm mm 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 with the highest quality materials and are designed to deliver 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 shopping, pay close attention to the sizes and dimensions of the product to ensure they meet your needs. Detailed information about the product, including features and specifications, is provided in the title and description. We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please feel free to reach out to us. We are here to assist you and will do our utmost to help. Thank you for choosing our product. We hope you enjoy it!