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Model # 48-89-2801

Internet # 100670139

Store SKU # 778354

Thunderbolt Black Oxide Drill Bit Set (21-Piece)

This item has been discontinued.
The Home Depot no longer carries this specific product.

Was  $24.97
$19.97 /  each

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Model # 48-89-2801

Internet # 100670139

Store SKU # 778354

The Milwaukee 48-89-2801 (21-Piece) Thunderbolt Black Oxide Drill Bit Set offers convenience and heavy-duty performance on the jobsite. Milwaukee Thunderbolt Black Oxide drill bits are designed for extreme durability and long life. The Thunderbolt web features a thicker core than a standard drill bit to provide ultimate strength and protect against side-load breakage. A specially designed parabolic flute form clears chips fast, while the 3-Flat Secure-Grip shank holds the bit firmly in the drill chuck. The 135 degree split point tip delivers a precision start and prevents walking for fast, accurate holes. Effective for drilling on curved surfaces, Milwaukee Thunderbolt Black Oxide bits require less effort to drill through metal, wood and PVC, and are highly recommended for use with portable drills. The set comes in a resilient case and includes bit sizes (2) 1/16 in, (2)5/64 in, 3/32 in, 7/64 in, (2) 1/8 in, 9/64 in, 5/32 in, 11/64 in, (2) 3/16 in, 13/64 in, 7/32 in, 15/64 in, (2) 1/4 in, 5/16 in, 3/8 in, and 1/2 in.

  • Extreme durability: thicker web provides greater strength and longer life
  • Fast, accurate drilling: 135 degree split point tip starts on contact to prevent walking, while the parabolic flute clears chips fast
  • Reduced slipping: 3-flat Secure-Grip shank holds the bit firmly in the drill chuck
  • Corrosion resistant: black oxide coating provides lubricity and resists corrosion of the bit
  • Includes 21 twist drill bits in jobber length bit sizes
  • Bit sizes range from 1/16 in. to 1/2 in.


Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Bit Material 
Black Oxide 
Drill Bit Type 
Drill Bit Type(s) Included 
Number of Pieces 
Power Tool Product Type 
Drill & Router Bits 
Shank Style 
Tools Product Type 
Power Tool 


Rated 4.3 out of 5 by 11 reviewers.
Rated 5.0 out of 5.0 by Very pleased I needed some new drill bits for the new Milwaukee drill impact driver I got over Christmas. The case is sturdy with a good latch and it fits nicely into my tool bag for easy transportation. I've only used the bits on wood so far but can say that they cut well and show no sign of wear or chipping. I would definitely buy these again. Especially since I got them on sale for a steal! March 25, 2015
Rated 4.0 out of 5.0 by BLACK OXIDE DRILL BIT SET good solid steel drill bits. Case is very innovative, with separate modules for different sizes February 3, 2015
Rated 4.0 out of 5.0 by extra little bits like that it comes with 2 of the little bit that break so easy April 6, 2015
Rated 4.0 out of 5.0 by Good set of drills for a good price. I bought these as an add on to an order of things I needed. Surprised by the low price and free shipping (because of my order total) was a bonus. These are not high end drill bits as evidence by somewhat rapid dulling when drilling steel and tendency of smaller bits to bend. But, for the money the are great! July 15, 2014
Rated 2.0 out of 5.0 by I am not very happy with these bits. These set looks great and is well organized/compact, but my complaint with them is the wood doesn't clear out of the groove. Every time I drill a hole, I have to scrape the wood out of the bit groove at least once per hole drilled. As the wood accumulates in the grooves at the tip, it will not drill any deeper. Therefore I have to pull the bit out and clear the wood that is stuck in the tip so I can reach the desired depth. This obviously slows me down a great deal. I bought these b/c I have a cheap Ryobi set and I wanted a better quality bit. Well, I am now using the old Ryobi set again. December 10, 2014
Rated 5.0 out of 5.0 by These drill bits worked good in both wood and metal. Had a job requiring me to drill multiple holes and sizes in wood and soft steel pipe. The real challenge for the bits was the pipe. The 3/8 bit was able to drill 4 holes through 2' pipe with no cutting lubricant at a slow speed and had no detectable dulling of the edge. February 11, 2014
Rated 5.0 out of 5.0 by Excellent product Excellent product, very sharp and produces a clean cut every time. January 14, 2014
Rated 5.0 out of 5.0 by i like how sharp theystay i like how they stay sharp and the case they came in it make it very easy to get the rite bite that you need , the way they case is just the rite size to fit in my tool bag October 20, 2013
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