Pro Grade Cobalt Drill Bit Set M35 HSS 135 Degree Twist Jobber Length Built For Hardened Metal Wood Plastic Stainless Steel Cast Iron With Index Storage Case Includes Fractional One Sixteenth To One Half Inch Sizes A To Z And 1 To 60

115-Piece Cobalt Drill Bit Set for Hardened Metals
✔️ 115-piece set includes 29 fractional, 26 letter A-Z, 60 numbers

This drill bit set is designed for high-performance drilling through hardened metals, stainless steel, cast iron, alloys, wood, and tough plastics. It comes with an index storage case to keep all bits organized for quick access on pro-grade projects.

✅ Material: M35 high-speed steel with 5% cobalt for heat and wear resistance
✅ 135° split-point for automatic centering and fast penetration
✅ Self-centering design and round straight shank prevent walking
✅ Fully ground twist design reduces friction and debris buildup
✅ Sizes included: 1/16 in (1.59 mm) to 1/2 in (12.70 mm) in 1/64 in (0.39 mm) increments; A-Z and #1-60
✅ Includes convenient index storage case for organization

💡 What is a cobalt HSS drill bit set best used for in metalworking? This handy set excels at drilling through hard metals and tough materials with precision.

- ideal for stainless steel, cast iron, and alloys
- improves drill life and heat resistance with 5% cobalt in M35 steel
- handy for metalworking projects and fabrication where precise holes matter