Best Single Bit
Irw in Cobalt Drill Bit Individual 1/4 Inch
Irwin
A single 1/4-inch cobalt drill bit from Irw in for drilling hardened steel, stainless and other tough metals.
- M42 cobalt
- 1/4 inch
- 135-degree split point
Pros
- Cobalt steel holds its edge in hard metals
- Heat resistant for drilling stainless steel
- Buy only the size you need instead of a full set
- Widely available replacement size
Cons
- Cobalt bits are brittle and can snap if side-loaded
- Needs low speed and cutting fluid for best life
- More expensive than standard HSS bits
Prices and availability change, so confirm on Amazon.View on Amazon