21 Piece Cobalt M42 Drill Bit Set With Case And Three Flat Shank For Stainless Steel Cast Iron Titanium Aluminum And Light Gauge Metals High Heat Resistant Long Lasting Bits With Enhanced 8 Percent Cobalt Alloy For 10X Life

21-Piece Cobalt M42 Drill Bit Set in Case for Hard Metals
✔️ 8% cobalt alloy, 10x life, high-heat resistance, three-flat shank, split points

This 21-piece cobalt M42 drill bit set comes in a plastic case for easy transport and organized storage. Designed for drilling hard metals, it performs well in stainless steel, cast iron, titanium, aluminum, and light-gauge metals common in fabrication and maintenance work.

✅ 8% cobalt M42 alloy for up to 10x life vs standard bits
✅ High-heat resistance for tough metal drilling
✅ Split points on 1/8 in (3.2 mm) and larger for easier starts
✅ Three-flat shank on 3/16 in (4.76 mm) and larger for better grip
✅ Thick web-helix design for fast material removal and stability
✅ Plastic case keeps bits organized and portable

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

In metalworking, cobalt M42 bits are handy for drilling hard materials where heat and wear are a concern. - drilling stainless steel, cast iron, titanium, aluminum
- extended bit life due to 8% cobalt alloy
- high-heat resistance for longer operation
- secure grip with three-flat shank on larger sizes