Long Life Cobalt M42 Drill Bit 3/16 Inch By 3 1/2 Inch, Tough Metal Drill Bit For Stainless Steel Cast Iron Titanium Aluminum, High Heat Resistance With 8 Percent Cobalt For Durable Drilling

Single 3/16 x 3-1/2 in M42 cobalt drill bit for hard metals
✔️ 8% cobalt M42 alloy, 10x durability, high-heat resistance

These cobalt drill bits are engineered for extreme durability and heat resistance, designed to cut through stainless steel, cast iron, titanium, and aluminum. They’re handy in metal fabrication, automotive workshops, and aerospace maintenance where tough metals slow down standard bits.

✅ Diameter 3/16 in (4.76 mm) and overall length 3-1/2 in (88.9 mm), jobber length
✅ 8% cobalt M42 alloy delivers up to 10x durability versus standard bits
✅ High-heat resistance to withstand extended drilling in tough metals
✅ Thick web-helix design enables fast material removal and stability
✅ Surface-hardened tip for penetrating hard, abrasive materials
✅ Split point on 1/8 in and larger for easy starts without punching
✅ Three-flat shank on bits 3/16 in and larger for better grip

💡 What is a cobalt drill bit used for in drilling stainless steel and other hard metals? These bits excel in heat resistance and offer long life in tough metalworking tasks.
- For stainless steel, cast iron, titanium, and aluminum with consistent cuts
- For high-temperature environments where ordinary bits wear fast
- For starting holes in hard metals with split point and sturdy shank
- For use in automotive, aerospace, and metal fabrication projects