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Bosch CO4139


Bosch CO4139

3/16" Cobalt SP Jobber Drill Bit (12 Pack)

Normally Ships in 7 - 10 business days

Sale Price: $20.99
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Bosch CO4139 3/16" Cobalt SP Jobber Drill Bit (12 Pack)


  • Bosch cobalt drill bits offer the best heat resistance and rigid thick web design for drilling in extremely hard and abrasive materials such as treated stainless steel (precipitation-hardened), cast iron and titanium
  • 135° split point starts on contact with no walking or skating and no center punch is required
  • A tough cobalt alloy delivers heat resistance up to 1100° Fahrenheit allowing the bit to perform for extended periods of time in the most abrasive materials without failing due to the high heat levels
  • Overall bit hardness of 66-68 HRC from the cobalt formulation gives the ability to penetrate exceptionally tough materials
  • High red hardness of cobalt steel permits speeds 30% higher than regular high speed steel drills

In The Box

In The Box

  • Twelve (12) 3/16" Cobalt SP Jobber Drill Bits


Additional Information

Manufacturer's SKU CO4139
UPC / ISBN 10000346333234
Brand Bosch
Additional No
Safety Info N/A
Shipping Weight 3.0000
Condition New
Product Weight (lbs.) N/A
Manufacturer's Warranty Product Defects Only
Return Policy Unopened Only, 30 Days
Addl Specs
  • Diameter: 3/16 Inch
  • Overall length: 3-1/2 Inches
  • Shank: 3/16 Inch
  • Coating: Cobalt
  • Number in Pack: 12
Video N/A

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