Welcome to our store! 1. Reduces grit and debris, improves wall quality, suitable for 3D printers. 2. Suitable for processing PCB SMT CNC boards, shapes, plastics, copper, stainless steel, and other precise metal parts. 3. Excellent manufacturing of tungsten carbide material ensures maximum durability and high hardness. 4. Includes 10 pcs drill bits in the package, meeting your various requirements and easy to use. 5. High-quality materials and fine polishing process can make the cutting edge of the bit sharper. Shipping: 100% brand new Product Type: Drill bits Material: Tungsten carbide Bit: Approximately 1 mm / 0.04 in Quantity: 10 pcs Usage: If the bit is blocked, gently twist the drill bit clockwise, do not insert it directly, which will cause the drill bit to break. 10 x Drill Bits Customers are our top priority. If you discover any issues with your product after receiving it, such as damage or incorrect quantity, please contact us immediately. We strive to provide you with the best post-purchase service.