The 170-piece spiral drill bit set from Ruko, known as Terrax HSS, offers a comprehensive selection of high-quality spiral drill bits specifically designed for precise drilling in various materials. The bits are made from high-performance high-speed steel (HSS-G) and feature a ground surface that ensures high concentricity. This set is ideal for use in metalworking, particularly when working with steel, cast iron, and aluminum alloys. The precise construction and cross-ground design of the bits allow for excellent centering and reduce the required feed rate, enhancing efficiency during application. With a variety of diameters, this set meets most requirements and is an indispensable tool for professionals and hobbyists alike.

• 170 spiral drill bits according to DIN 338 Type N HSS-G
• Made from high-performance high-speed steel for durability
• Increased concentricity due to complete grinding process
• Suitable for a variety of materials, including steel and cast iron
• Cross-ground design for improved centering and reduced feed force.