The RUKO high-performance high-speed steel (HSS) drill bit set offers a comprehensive collection of 19 precision drills for professional and demanding DIY applications. This set includes drill sizes ranging from 1 mm to 10 mm, specifically 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.25 mm, 3.5 mm, 4 mm, 4.25 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, and 10 mm in diameter. All drills are made from high-performance high-speed steel (HSS), a material known for its durability and heat resistance, making them suitable for drilling various materials such as wood, metal, plastic, and stainless steel. The drills conform to the DIN 338 standard, ensuring consistent quality and performance. Each drill features a bronze-colored surface that provides corrosion protection and facilitates the identification of set components. The set comes in a protective box that securely stores the drills and makes them easily accessible. This extensive range of sizes allows users to tackle a variety of drilling tasks with precision, from fine work with the 1 mm drill to larger diameters with the 10 mm drill. The inclusion of half-millimeter increments (such as 1.5 mm, 2.5 mm, 3.5 mm, 4.5 mm, and 5.5 mm) offers additional versatility for specific applications that require intermediate sizes. The high-performance high-speed steel construction maintains sharp cutting edges even with prolonged use, providing reliable performance for both manual and electric drills. The set is designed for users who need a complete set of drill sizes for workshop, construction, or DIY projects where material variety and size precision are important considerations.