Bosch 11/64-in x 3-1/4-in Jobber Drill Bit, Cobalt, Bulk
Bosch CO4138
SKU BPT-CO4138
Bosch's 11/64-in x 3-1/4-in jobber drill bit is made of durable cobalt that provides a lifespan four times longer than standard bits. The rigid, thick web design adds stability in tough applications. Browse more at HomElectrical now!
Image may not depict product actual color, inclusions or accessories
Bosch's 11/64-in x 3-1/4-in jobber drill bit is made of durable cobalt that provides a lifespan four times longer than standard bits. The rigid, thick web design adds stability in tough applications. Browse more at HomElectrical now!
- Bulk Pack.
- Diameter: 11/64 Inch.
- Overall Length: 3-1/4 Inch.
- Shank: 11/64 Inch.
- Withstands high-temperature applications for extended periods of time (up to 1,100 F).
- Rigid, thick web design adds stability to bit in tough applications.
- Surface hardened to penetrate tough abrasive materials.
- Best used for drilling into light-gauge metal, high-carbon steel, aluminum and ally steel, cast iron, stainless steel and titanium.
Similar Drill Bit Products
Bosch CO4138 Description
- Bulk Pack.
- Diameter: 11/64 Inch.
- Overall Length: 3-1/4 Inch.
- Shank: 11/64 Inch.
- Withstands high-temperature applications for extended periods of time (up to 1,100 F).
- Rigid, thick web design adds stability to bit in tough applications.
- Surface hardened to penetrate tough abrasive materials.
- Best used for drilling into light-gauge metal, high-carbon steel, aluminum and ally steel, cast iron, stainless steel and titanium.
Similar Drill Bit Products
Get FREE shipping on eligible order of $99+
Free Shipping Eligible
$2.90Each
Sold by the Case of 12 for only $34.80
Ships between 06/01/2026 - 06/03/2026
Return180-day Return Policy
Product Specifications
| Part Number | CO4138 |
| Weight | 0.01-lb |
| UPC | 000346333220 |
Manufacturer Description
11/64-in COBALT SP JOBBER DRILL BIT (BULK)
Important PROP 65 InformationWarning: This product can expose you to chemicals, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov. to CA residents.
Bosch's 11/64-in x 3-1/4-in jobber drill bit is made of durable cobalt that provides a lifespan four times longer than standard bits. The rigid, thick web design adds stability in tough applications. Browse more at HomElectrical now!
Get FREE shipping on eligible order of $99+
Free Shipping Eligible
$2.90Each
Sold by the Case of 12 for only $34.80
Ships between 06/01/2026 - 06/03/2026
Return180-day Return Policy
Similar Drill Bit Products
Bosch CO4138 Description
- Bulk Pack.
- Diameter: 11/64 Inch.
- Overall Length: 3-1/4 Inch.
- Shank: 11/64 Inch.
- Withstands high-temperature applications for extended periods of time (up to 1,100 F).
- Rigid, thick web design adds stability to bit in tough applications.
- Surface hardened to penetrate tough abrasive materials.
- Best used for drilling into light-gauge metal, high-carbon steel, aluminum and ally steel, cast iron, stainless steel and titanium.
Product Specifications
| Part Number | CO4138 |
| Weight | 0.01-lb |
| UPC | 000346333220 |
Manufacturer Description
11/64-in COBALT SP JOBBER DRILL BIT (BULK)
Important PROP 65 InformationWarning: This product can expose you to chemicals, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov. to CA residents.
Product Questions & Answers
Customer Reviews
Your voice matters. Be the first to leave a review and help other pros shop smarter