Four Spiral Flute Cobalt Step Drill Bit Set 1/8 To 7/8 Inch, Wear-Resistant TiAlN Coated 1/4 Inch Hex Shank Unibit For Metal, Stainless Steel, Aluminum, Wood, Plastic, 3-Piece
✔️ Four-cut blade design for faster, smoother cutting and easy swarf exit
This 3-piece spiral cobalt step drill bit set provides multiple hole sizes from 1/8" to 7/8" with a 1/4" hex shank. Made from M35 cobalt steel and TiAlN coating for wear resistance, it’s built for long life and reliable cutting through metal, stainless steel, aluminum, wood, and plastic in fabrication shops and home garages.
✅ Four cutting blades boost drilling speed and reduce deflection
✅ M35 cobalt steel provides high red hardness and wear resistance
✅ TiAlN coating extends tool life up to 10x in metalworking
✅ 1/4in hex shank fits standard drill chucks; sizes include 1/8"-1/2", 1/4"-3/4", 3/16"-7/8" (3.175-12.70 mm, 6.35-19.05 mm, 4.76-22.23 mm)
💡 What is a cobalt step drill bit set used for in metalworking and DIY projects? This handy tool helps you create stepped holes across different materials. - step drill bit for metalworking and sheet metal - long life TiAlN coated M35 cobalt steel - covers sizes 1/8 to 7/8 inches with 1/4in hex shank