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Bosch CO14B Cobalt M42 Drill Bit Set 14-Piece

Bosch M42 cobalt at a lower price point than Irwin

✎ PickHonest Research Desk▦ Updated October 15, 2026◷ 3 min read

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Best Bosch

Bosch CO14B Cobalt M42 Drill Bit Set 14-Piece

Bosch

Bosch M42 cobalt at a lower price point than Irwin

  • M42 cobalt
  • 14-piece
  • Bosch quality

Pros

  • Bosch M42 cobalt at a lower price point than Irwin
  • 14-piece covers the most common drill sizes
  • Bosch is a globally respected precision tool brand

Cons

  • 14-piece vs Irw in 29-piece - missing some sizes
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Where the Bosch CO14B Cobalt M42 Drill Bit Set 14-Piece ranks

Best picksBest Drill Bits for Hardened Steel 2026: 10 Cobalt and Carbide BitsOur top pick for drill bits for hardened steel is the Irw in Cobalt Drill Bit Set 29-Piece (M42 cobalt with 8% cobalt content - highest cobalt grade for hardened steel).