Model # DD4069

Internet #203321667

DEWALT Cobalt Set (29-Piece)


Cobalt Set (29-Piece)

$12936 /each
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Product Overview

When the drilling gets tough, get some DEWALT Cobalt Drill Bits. These high-performance twist-drill bits are specifically engineered for drilling through hard metals and steel, including stainless steel. Made of industrial-strength cobalt, these bits feature a 135° split point for enhanced hole drilling, including quick starts and clean, burr-free holes.

  • 8% cobalt for longer life
  • Thicker core for greater durability
  • 29-piece set
  • Patented web taper is 2X larger than the competition for increased strength, rigidity and breakage resistance



Product Depth (in.)
Product Height (in.)
Product Width (in.)


Bit Material
Drill Bit Type
Drill Bit Type(s) Included
Number of Pieces
Shank Style
Shank Style
Tools Product Type
Power Tool

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Customer Questions & Answers

Do these have a warranty. If so what is the warranty

Asked by: Garrett
Thank you for your recent inquiry with The Home Depot, Garrett. These drill bits have a 90 day return policy but no warranty beyond that from Dewalt. We appreciate your business and look forward to serving you in the future. Thank you for shopping Home Depot
Answered by: THDSupport
Date published: 2016-01-15
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Customer Reviews

Cobalt Set (29-Piece) is rated 3.7 out of 5 by 3.
Rated 4 out of 5 by from The drill bits were exactly what I needed. Excellent product. The drill bits were exactly what I needed. Excellent product.
Date published: 2017-02-28
Rated 5 out of 5 by from Favorite These are my favorite bits Very aggressive whene drilling into steel but must be carefull when going through stainless.... Especially if going throught with a 5/16 or bigger.... But overall very durable
Date published: 2016-12-10
Rated 2 out of 5 by from 8% Cobalt bits are brittle and break easily I have to drill multiple holes in stainless steel at work with a cordless drill. The stainless is very hard; only Titanium, Carbide, or Cobalt drills can touch it. I bought these bits because they're very high in Cobalt: 8%. My thinking was that this would increase their hardness. Well, it did. They were very hard. They were also very brittle. It turns out you're only supposed to use 8% bits in machine tools like a drill press or vertical mill. Using them in powered hand tools makes them chip easily and shatter often. I returned this set and bought a 5% set from another store in mid February. It's a month later and the 5% bits have been serving me well so far.
Date published: 2014-03-12
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