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Bosch CO18 18-Piece Plastic Cobalt Drill Bit Set

4.5 out of 5 stars 374 customer reviews
| 23 answered questions

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  • Withstands high-temperature applications for extended periods of time (up to 1,100 degrees F)
  • Rigid, thick web design adds stability to bit in tough applications
  • Surface hardened to penetrate tough abrasive materials
  • Available in jobber length, full shank
  • Best used for drilling into light-gauge metal, high-carbon steel, aluminum and ally steel, cast iron, stainless steel and titanium

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From the manufacturer

Drill Bit Type Cobalt Cobalt Black Oxide Black Oxide Titanium Drill Bit Titanium Drill Bits
Model Number CO14 CO21 BL21A BL29 TI21A TI29
# of Pieces 14 21 21 29 21 29

Product description

Product Description

Bosch cobalt drill bits are specially designed for drilling in hard steel. Thick web helix delivers fast material removal combined with increased durability for maximum efficiency and performance. Each bit is manufactured to exacting specifications. Bits 1/8 In. and larger feature a split point that starts on contact with no walking or skating, eliminating the need for a center punch.

Amazon.com

These Bosch cobalt drill bits offer superior heat resistance, plus a rigid thick web design for drilling in extremely hard or abrasive materials such as treated stainless steel (precipitation-hardened), cast iron and titanium.

What's in the Box

  • 1/16-inch bit (2)
  • 5/64-inch bit (2)
  • 3/32-inch bit
  • 7/64-inch bit (2)
  • 1/8-inch bit (2)
  • 9/64-inch bit
  • 5/32-inch bit
  • 11/64-inch bit
  • 3/16-inch bit
  • 7/32-inch bit
  • 1/4-inch bit
  • 5/16-inch bit
  • 3/8-inch bit
  • 1/2-inch bit
  • plastic case


Product information

Technical Details

Technical Specification

Warranty [pdf ]

Additional Information

Warranty & Support

For warranty information about this product, please click here [PDF ]

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Customer Reviews

Top Customer Reviews

on October 12, 2011
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on August 18, 2015
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on July 30, 2015
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