General description AlwaysH HSC Extra Long Drill Bit Set includes 8 drill bits with varying diameters, designed for precision drilling in a wide range of materials. The set features high-quality HSS 4241 steel, ensuring durability and efficiency in your drilling tasks. Technical specifications Material: High Speed Steel (HSS 4241) Diameter options: 4mm, 4.2mm, 4.5mm, 5mm, 5.2mm, 6mm, 8mm, 10mm Total length: 200mm Quantity: 8 pieces Compatibility and accessories Suitable for drilling in steel castings, spring steel, white steel, I-beam, ordinary steel, angle iron, aluminum, copper, wood, and stainless steel (1-4mm) Usage Ideal for precise positioning and fast cutting Effective chip removal and good wear resistance