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Bosch BL4148


Bosch BL4148

21/64" Black Oxide SP Jobber Drill Bit (6 Pack)

Normally Ships in 7 - 10 business days

Sale Price: $14.96
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Bosch BL4148 21/64" Black Oxide SP Jobber Drill Bit (6 Pack)


Product Description

Bosch designed the new High-Speed Steel Black Oxide drill bits for all-purpose heavy-duty drilling in wood, plastic, carbon and alloy steels, aluminum and soft cast iron. With triple tempered black oxide coating, these Bosch bits will last 50-percent longer than standard uncoated high-speed drill bits. Since heat is the single largest hindrance to the life of a bit, Bosch designed a special coating that gives each bit a high level of lubricity to reduce heat build up and prolong the life of each bit. Whether a professional or serious do-it-yourselfer, precise holes and longer lasting bits make a big difference in any job or project. And since Bosch understands that time is money, it combined features like a 135-degree spilt point that starts on contact and enlarged flutes with a high helix for faster material removal to make these Black Oxide bits three-times faster than standard drill bits on the market.
  • The speed helix design penetrates 3X faster than standard bits which means easier drilling, reduced heat, extended drill bit life and extended cordless battery life
  • Triple tempered black oxide coated bits last 50% longer than regular high speed steel and offer reduced friction between bit and workpiece
  • 135° split point starts on contact with no walking or skating and no center punch is required

In The Box

In The Box

  • Six (6) 21/64" Black Oxide SP Jobber Drill Bits



  • Steel
  • Copper
  • Aluminum
  • Brass
  • Oak
  • Maple
  • MDF
  • Pine
  • PVC
  • Polycarbonate
  • Acrylic
  • ABS
  • Nylon
  • Composite materials


Additional Information

Manufacturer's SKU BL4148
Brand Bosch
Additional No
Safety Info N/A
Shipping Weight 1.5000
Condition New
Product Weight (lbs.) N/A
Manufacturer's Warranty Product Defects Only
Return Policy Unopened Only, 30 Days
Addl Specs
  • Diameter: 21/64 Inch
  • Overall Length: 4-5/8 Inches
  • Shank diameter: 21/64 Inch
  • Coating: Black Oxide
  • Number in Pack: 6
Video N/A

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