Upgrade your drilling capabilities with the ThunderBolt Black Oxide Drill Bit Set - 21PC. This comprehensive set includes 21 high-performance drill bits, designed for durability and precision. The black oxide coating reduces friction and increases the longevity of the bits, ensuring they stay sharp for longer periods. Each bit features a precision-cut tip for faster, cleaner starts and reduced bit walking. The set covers a wide range of sizes, making it ideal for various materials such as metal, wood, and plastic. Perfect for professionals and DIY enthusiasts, the ThunderBolt Drill Bit Set ensures reliable performance and versatile use for all your drilling needs. Store and organize your bits easily with the included compact case, making it convenient to carry and access the right bit for any job.