● Power Tools · Review

Irwin Cobalt Drill Bit Set 29-Piece

Sponsored link · confirm price and availability on Amazon · updated October 16, 2026

✎ PickHonest Research Desk▦ Updated October 15, 2026◷ 4 min read

As an Amazon Associate I earn from qualifying purchases. Picks are based on manufacturer specs, independent reviews and owner reports.

Best Overall

Irw in Cobalt Drill Bit Set 29-Piece

M42 cobalt with 8% cobalt content - highest cobalt grade for hardened steel

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Pros

  • M42 cobalt with 8% cobalt content - highest cobalt grade for hardened steel
  • 135-degree split point starts without a center punch on most surfaces
  • Irw in is the benchmark bit brand used by professional machinists
  • 29-piece coverage from 1/16 to 1/2 inch

Cons

  • Set price is high - individual bits available if only specific sizes are needed

Is the Irw in Cobalt Drill Bit Set 29-Piece worth it?

Yes, for the right buyer. The Irw in Cobalt Drill Bit Set 29-Piece ranks #1 in our Best Drill Bits for Hardened Steel 2026 list (best overall). Its biggest strength: m42 cobalt with 8% cobalt content - highest cobalt grade for hardened steel. The ma in caveat: set price is high - individual bits available if only specific sizes are needed.

Alternatives to the Irw in Cobalt Drill Bit Set 29-Piece

Products ranked near it in our research, each better for a slightly different buyer.

Buying advice: power tools

  • 1Major platforms each cover hundreds of tools. Choose one with the specialty tools you may need later.
  • 2Brushless motors are more efficient and durable. Brushed tools are fine for occasional light use.
  • 3Kits include batteries and a charger. Once you own batteries, bare tools are much cheaper.
  • 412V tools are compact for light work. 18V or 20V max tools handle most home projects. Higher-voltage platforms suit heavy cutting.
  • 5Check tool and battery warranty lengths and whether registration is required.

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FAQ

Common questions

Is the Irw in Cobalt Drill Bit Set 29-Piece worth buying?

Yes, for the right buyer. The Irw in Cobalt Drill Bit Set 29-Piece ranks #1 in our Best Drill Bits for Hardened Steel 2026 list (best overall). Its biggest strength: m42 cobalt with 8% cobalt content - highest cobalt grade for hardened steel. The ma in caveat: set price is high - individual bits available if only specific sizes are needed.

Who is the Irw in Cobalt Drill Bit Set 29-Piece best for?

Based on our research it suits hardened steel 2026. It's ranked #1 of 10 in our Best Drill Bits for Hardened Steel 2026 list.

What are the downsides of the Irw in Cobalt Drill Bit Set 29-Piece?

The ma in trade-offs owners and reviewers point to: set price is high - individual bits available if only specific sizes are needed.

What are the key features of the Irw in Cobalt Drill Bit Set 29-Piece?

M42 cobalt steel, 8% cobalt content, 135-degree split point and 29-piece 1/16 to 1/2 inch.

What are the best alternatives to the Irw in Cobalt Drill Bit Set 29-Piece?

Worth comparing: Irw in Cobalt Drill Bit Individual 1/4 Inch, DeWALT DWA1269 Cobalt Drill Bit Set 29-Piece and Bosch CO14B Cobalt M42 Drill Bit Set 14-Piece. Each ranks near it in our research for a slightly different buyer.

Where can I buy the Irw in Cobalt Drill Bit Set 29-Piece?

It's sold on Amazon. Prices and stock change often, so check the current listing before you buy, our link takes you straight to it.

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