Engineered for precision drilling in tough metal materials, offering durability and long-lasting performance. Made from high-speed steel (HSS) with a cobalt coating, this drill bit provides exceptional hardness and resistance to wear, making it ideal for tough applications. The 4mm size ensures clean, accurate holes, even in hard metals like stainless steel. Perfect for professionals and DIY enthusiasts alike, the Bosch HSS Cobalt drill bit delivers fast, efficient results while maintaining its sharpness through extended use. This high-quality drill bit is an essential tool for metalworking and construction projects. Cash on Delivery 7-Day Easy Returns Free Delivery Fulfilled by Fepy Secure Checkout 100% Genuine & Warranty Security & Privacy Secure Payments 24/7 Online Support About this item Engineered for precision drilling in tough metal materials, offering durability and long-lasting performance. Made from high-speed steel (HSS) with a cobalt coating, this drill bit provides exceptional hardness and resistance to wear, making it ideal for tough applications. The 4mm size ensures clean, accurate holes, even in hard metals like stainless steel. Perfect for professionals and DIY enthusiasts alike, the Bosch HSS Cobalt drill bit delivers fast, efficient results while maintaining its sharpness through extended use. This high-quality drill bit is an essential tool for metalworking and construction projects.