Bosch 21/64-in x 4-5/8-in Jobber Drill Bit, Black Oxide, Bulk
Bosch BL4148
SKU BPT-BL4148
Bosch's 21/64-in x 4-5/8-in black oxide coated fractional jobber drill bits are equipped with a speed helix design as well a split point that starts on contact and eliminates walking or skating. Browse more drill bits at HomElectrical today!
Image may not depict product actual color, inclusions or accessories
Bosch's 21/64-in x 4-5/8-in black oxide coated fractional jobber drill bits are equipped with a speed helix design as well a split point that starts on contact and eliminates walking or skating. Browse more drill bits at HomElectrical today!
- Bulk Pack.
- Diameter: 21/64 Inch.
- Overall Length: 4-5/8 Inch.
- Shank: 21/64 Inch.
- Speed helix design for three times faster drilling than standard bits.
- Last 50% longer than high-speed steel.
- Easier drilling, reduced heat and extended drill bit life.
- For use in steel, copper, aluminum, brass, oak, maple, MDF, pine, PVC, polycarbonate, acrylic, ABS, nylon and composite materials.
Similar Drill Bit Products
Bosch BL4148 Description
- Bulk Pack.
- Diameter: 21/64 Inch.
- Overall Length: 4-5/8 Inch.
- Shank: 21/64 Inch.
- Speed helix design for three times faster drilling than standard bits.
- Last 50% longer than high-speed steel.
- Easier drilling, reduced heat and extended drill bit life.
- For use in steel, copper, aluminum, brass, oak, maple, MDF, pine, PVC, polycarbonate, acrylic, ABS, nylon and composite materials.
Similar Drill Bit Products
Get FREE shipping on eligible order of $99+
Free Shipping Eligible
$5.29Each
Sold by the Case of 6 for only $31.74
Ships between 07/03/2026 - 07/07/2026
Return180-day Return Policy
Product Specifications
| Part Number | BL4148 |
| Weight | 0.08-lb |
| UPC | 000346328837 |
Manufacturer Description
21/64-in BLACK OXIDE SP JOBBER (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 21/64-in x 4-5/8-in black oxide coated fractional jobber drill bits are equipped with a speed helix design as well a split point that starts on contact and eliminates walking or skating. Browse more drill bits at HomElectrical today!
Get FREE shipping on eligible order of $99+
Free Shipping Eligible
$5.29Each
Sold by the Case of 6 for only $31.74
Ships between 07/03/2026 - 07/07/2026
Return180-day Return Policy
Similar Drill Bit Products
Bosch BL4148 Description
- Bulk Pack.
- Diameter: 21/64 Inch.
- Overall Length: 4-5/8 Inch.
- Shank: 21/64 Inch.
- Speed helix design for three times faster drilling than standard bits.
- Last 50% longer than high-speed steel.
- Easier drilling, reduced heat and extended drill bit life.
- For use in steel, copper, aluminum, brass, oak, maple, MDF, pine, PVC, polycarbonate, acrylic, ABS, nylon and composite materials.
Product Specifications
| Part Number | BL4148 |
| Weight | 0.08-lb |
| UPC | 000346328837 |
Manufacturer Description
21/64-in BLACK OXIDE SP JOBBER (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