High-Performance Materials：Made of 6542 HSS taps and M35 cobalt drill bits, ensuring high hardness, wear resistance, and long service life Efficient Spiral Point Design：The spiral point tap facilitates smooth downward chip evacuation, ensuring burr-free threads and smooth drilling results, making it ideal for through-hole threading in both metals and plastics Double Rust Prevention: Roasted yellow drill bits remove metal surface oxidation for better corrosion resistance; Ti-coated taps enhance rust/heat resistance & reduce cutting friction, durable in damp environments or high-temperature processing Stable and Reliable: All tools undergo heat treatment for higher structural strength, withstanding frequent use – reliable for both hobbyists’ DIY projects and technicians’ professional processing Broad Applications：Designed for metalworking, automotive, electronics & DIY projects – complete 2.5mm drilling + M3×0.5 threading in one set.Use with tapping oil/lubricant to improve thread quality & tool durability Model 3 Set Name 3-Pack Metric Tap & Drill Bit Set Brand Name Stitokg Shank Type Straight Unit Count 3.0 Count Part Number M3DrillBitSet-3 Finish Types Titanium Manufacturer Stitokg Material Type Cobalt Tool Flute Type Spiral Cutting Diameter 2.5 Millimeters Number of Flutes 2 Number of Pieces 3 Surface Recommendation Metal