Three Eighths Inch Cobalt Drill Bit Set Amoolo Five Pieces M35 High Speed Steel Drill Bits For Hard Metal Stainless Steel Cast Iron Versatile Metalworking Bit Kit

3/8-Inch Cobalt Drill Bit Set, 5-Piece M35 HSS for Metal
✔️ 3/8 in dia, flute 3-5/8 in long (92.08 mm), 5% cobalt M35 HSS

These cobalt drill bits deliver high wear resistance and heat tolerance for metalworking, ideal for drilling through stainless steel, steel, cast iron, and hard alloys. Each bit is 3/8 in diameter (9.26 mm) with a flute length of 3-5/8 in (92.08 mm), and the set fits most standard power drills.

✅ Diameter: 3/8 in (9.26 mm); flute length: 3-5/8 in (92.08 mm)
✅ Material: M35 cobalt high speed steel with 5% cobalt for wear resistance
✅ Point: Fully ground with 135° split point to prevent walking
✅ Applications: stainless steel, steel, cast iron, aluminum, plastic; use with proper speed

💡 What is a cobalt drill bit set best used for in metalworking?

These handy bits are designed to cut hard metals more efficiently while staying sharp longer.

- High hardness and wear resistance from 5% cobalt for stainless steel and alloys
- 135° split point for starting accuracy and reduced walking
- Works with standard 3/8 in shank drills; ideal for machining, fabrication, and DIY projects
- Includes 5 pieces for common metalworking tasks