29-Piece Twist Drill Bit Set With 8 Percent Cobalt M42 For Hardened Steel And Cast Iron, Jobber Length, Fully Ground Bits From 1/16 To 1/2 Inch, Rugged Tough As Nails Durability For Metalworking And Precision Drilling
✔️ 29 piece set with 64th inch fractions (1.5875-12.7 mm), ground bits
This 29-piece cobalt drill bit set uses premium 8% cobalt HSS M42 for improved wear resistance and heat tolerance. Jobber-length bits provide a balanced mix of reach and rigidity, ideal for metalworking and DIY projects, drilling metal, stainless steel, cast iron, wood, and plastic for clean, accurate holes.
✅ 8% cobalt HSS M42 for superior hardness and wear resistance
✅ 64th-inch size coverage from 1/16" to 1/2" for precise drilling
✅ 135-degree split-point minimizes wandering for quick starts
✅ Fully ground edges per ASME/ANSI B94.11M standards for smooth cutting
✅ Jobber length provides a good balance of reach and rigidity
✅ Indexed metal case keeps bits organized and protected
💡 What is the best use for 8% cobalt M42 drill bits in metalworking?
These cobalt bits excel when drilling through tough metals, offering longer life and cleaner holes.
- High hardness and heat resistance handle stainless steel, cast iron, and other hard metals
- Range covers 1/16" to 1/2" in 64th increments for precise hole sizing
- Fully ground, sharp cutting edges reduce friction and improve speed