Description: This screw tap drill bit set is made of high rate steel, with high hardness and good abrasion resistance. It includes 6pcs drill bit from M3 to M10. Compact and portable, this tool set is perfect for drilling and tapping, suitable for soft metal. Features: High rate steel screw tap drill bits are of high hardness and good abrasion resistance. Drill bit of HSS 4341 is suitable for soft metals such as aluminum alloy, tin alloy, zinc alloy, and drill bit of HSS 6542 is also suitable for the processing of thin iron sheet. Combine drill bit with screw tap, convenient for your processing, time and labor saving. Universal hex shank, compatible with 3-jaw chuck. 6pcs per set, including M3*0.5mm, Diameter4*0.7mm, M5*0.8mm, M6*1mm, M8*1.25mm and M10*1.5mm. Specifications: Condition: 100% Brand New Material: HSS4341, HSS6542 Ti Plated (Optional) Size: M3*0.5mm, Diameter4*0.7mm, M5*0.8mm, M6*1mm, M8*1.25mm, M10*1.5mm Weight: approx. 61~85g Package Included: 6 x Screw Tap Drill Bits