General description You will receive 30 pieces of cobalt drill bits, double-ended, with a drilling diameter of 1/8 inch. This set provides enough quantity to meet your daily use needs. The cobalt drill bits are made of M35 carbide, which is strong, heat-resistant, and wear-resistant, ensuring a long service life. Each drill bit features a double-ended twist design with two cutting points, allowing you to drill two holes at each end to improve drilling efficiency. Technical specifications Quantity: 30 pieces Drilling diameter: 1/8 inch Length: approximately 1.89 inches / 4.8 cm Material: M35 cobalt Wide application Suitable for drilling in hard metals such as stainless steel, cast iron, and titanium alloys Effective for hard plastics and wood Can also be used on some soft materials Other information