DeWalt Industrial Cobalt Alloy Steel Set DWA1240 (14-Piece) Review (2026)
By The DIYPicks Team · Updated July 2026
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- Metal
- Stainless steel
- Hard metals
A metal-drilling workhorse: solid M35 cobalt (not just a coating) means the hardness goes all the way through, making it the pick for stainless, angle iron, and other hard metals that eat cheaper bits.
Pros
- Cobalt alloy runs cooler and holds an edge in stainless and hardened steel far better than plain HSS
- Pilot Point split tip starts on contact and stops walking, so you skip the center-punch step
- Bits can be resharpened multiple times, unlike coated bits that lose their edge once the coating wears
Cons
- More brittle than HSS - the tips can snap if you flex the bit or drill at an angle
- Set stops at 3/8 in, so you need a separate solution for larger holes
- Costs roughly double a titanium-coated set of the same piece count
Specifications
| Material | Cobalt (M35, 8% cobalt) |
|---|---|
| Sizes | 1/16 - 3/8 in (14 bits) |
| Shank | Round straight |
| Point | 135 deg split point (Pilot Point) |
| Best for | Stainless, angle iron, I-beams |