- HSS Titanium Coating: Engineered with classic HSS construction and a titanium coating, our drill bits offer exceptional durability and cutting performance. The hardened and honed cutting edge ensures sharpness, while the chatter-free design and staggered cutting teeth allow for precise countersinking and clean holes. These bits are built to withstand multiple uses without deformation. - Versatile Applications: Featuring a 135° fast cutting point, these drill bits automatically center and penetrate quickly, requiring less pressure. This drill kit is ideal for a variety of materials, including wood, cast iron, aluminum alloy, plastic, and fiberglass. - Comprehensive Set: This kit includes a wide range of sizes: 16 pieces of 1.5mm bits, 16 pieces of 2.0mm bits, 15 pieces of 2.5mm bits, 10 pieces of 3.0mm bits, 10 pieces of 3.2mm bits, 8 pieces of 3.5mm bits, 8 pieces of 4.0mm bits, 3 pieces of 4.5mm bits, 3 pieces of 5.0mm bits, 2 pieces of 5.5mm bits, 2 pieces of 6.0mm bits, 2 pieces of 6.5mm bits, 2 pieces of 8.0mm bits, and 2 pieces of 10.0mm bits. - Easy Organization: Each bit size is organized into different compartments within a durable plastic box. The corresponding sizes are clearly printed on the lid's underside, ensuring quick and convenient access when you need the right size for your project. Use Cases: 1. Efficiently drill precise holes for furniture assembly in wood projects. 2. Create clean and accurate holes in aluminum for automotive repairs. 3. Seamlessly tackle home improvement tasks by drilling into plastics and fiberglass materials.