Comprehensive Size Range: Includes 29 cobalt drill bits in sizes ranging from 1/16″ to 1/2″, such as 1/8″, 3/16″, and 1/4. This wide range ensures precision for various drilling tasks on stainless steel, cast iron, and hard metals. Premium Cobalt Material: Made from M35 high-speed steel and coated with cobalt for exceptional durability. The cobalt drill bits stay sharp longer, offering extended life and superior performance when drilling tough materials like stainless steel and cast iron. Enhanced Precision Design: Features a 135° split point tip for faster penetration and reduced walking. The twist drill bit design with deep grooves ensures smooth chip removal and stable operation, delivering accurate results for demanding jobs. Ideal for Hard Materials: Specifically designed for drilling stainless steel, cast iron, and other hard metals, this set is perfect for professional projects or DIY applications requiring reliable and efficient performance. Organized Indexed Storage: Comes in a sturdy metal storage case with clearly labeled size indexes for quick identification. Keeps your cobalt drill bit set organized and easily accessible during work. Versatile Application: Perfect for a wide range of projects, including metalworking, carpentry, and DIY repairs. This cobalt drill bit set is a must-have for professionals, hobbyists, and home improvement enthusiasts alike. Built for Durability: Engineered with high-quality materials and craftsmanship, these cobalt twist drill bits resist wear, heat, and corrosion, ensuring long-lasting performance even in demanding drilling environments. Professional-Grade Quality: Designed to meet rigorous standards, this 29-piece cobalt drill bit set offers professional-grade results with enhanced durability, precision, and convenience.