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Bosch BL4156


Bosch BL4156

29/64" Black Oxide SP Jobber Drill Bit with 3/8" Reduced Shank (6 Pack)

Bosch black oxide bits offer superior durability, speed and selection for most general purpose applications.

Normally Ships in 7 - 10 business days

Sale Price: $5.40
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Bosch BL4156 29/64" Black Oxide SP Jobber Drill Bit with 3/8" Reduced Shank (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 split 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) 29/64" Black Oxide SP Jobber Drill Bits



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


Additional Information

Manufacturer's SKU BL4156
UPC / ISBN 000346328905
Brand Bosch
Additional No
Safety Info No
Shipping Weight 1.5000
Condition New
Product Weight (lbs.) No
Manufacturer's Warranty Product Defects Only
Return Policy Unopened Only, 30 Days
Addl Specs
  • Diameter: 29/64 Inch
  • Overall Length: 5-5/8 Inches
  • Shank: 3/8 Inch Reduced
  • Coating: Black Oxide
  • Number in Pack: 6
Video No

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