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Model #48-89-2331

Store SKU #1001294844

Cobalt Red Helix Drill Bit Set for Drill Drivers (15-Piece)

  • QUADEDGE TIP decrease heat build up for faster drilling
  • RED HELIX for rapid material extraction
  • ENHANCED TAPERED WEB increases flute durability & core strength
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Frequently Bought Together


Product Overview

The MILWAUKEE 15 piece Cobalt RED HELIX Drill Bit Kit is engineered for extreme durability and long life in hard metal applications. The drill bits are designed with Variable Helix featuring an aggressive 35° Helix Angle ending at 15°. This allows for Rapid Chip Removal, limiting heat buildup to stay sharper longer. The 135° split point bit tip delivers a precision start and prevents walking for fast, accurate holes. The heavy duty drill bits are ideal for tough applications and provide Up to 10X life vs Black Oxide drill bits. The bit in the kit can be used in all twist drilling applications.
  • Up to 10X Life vs. black oxide
  • RED HELIX design for rapid chip removal
  • 135° split point for precision start no walking
  • Chip breaker decreases heat buildup
  • Secure grip - prevents bit from slipping in chuck
  • 15PC kit
  • Over $80 Value
  • Includes: 1/16 in., 5/64 in., 3/32 in.,7/64 in., (2)1/8 in., 9/64 in., 5/32 in., 3/16 in., 7/32 in., (2)1/4 in., 5/16 in., 3/8 in., 1/2 in.
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Info & Guides

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Product Depth (in.)
Product Height (in.)
Product Width (in.)


Bit Material
Drill Bit Type
Drill Bit Type(s) Included
Number of Pieces
Shank Style
Shank Style
Tools Product Type
Power Tool

Questions & Answers


Will these drill through 1/4 inch titanium sheet metal?

Asked by Chris June 3, 2021

Hi Chris, have never tried that you might call Milwaukee at 1.800.729.3878, sure the drill bits will but am not 100% sure

29 DIFFERENT SIZE BITS?? OR ONLY 15 DIFFERENT SIZE BITS?? On Home Depot.com the Internet# 3013321...

Asked by Troy May 26, 2021


are these M35 or M42?

Asked by Nancy April 25, 2021

Hi Nancy they are M35

Is hss-cobalt?

Asked by Rayo March 17, 2021

HSS stands for High Speed Steel. Which is a type of high catrbon steel. Cobalt, as I understand it, is a coating like Titanium coated bits. Cobalt bits can cut harder materials than HSS, or Titanium coated bits. I reserve using these bits for harder steels. Here's a handy guide: https://www.cnclathing.com/guide/drill-bit-material-comparison-types-what-is-the-best-drill-bit-material-cnclathing

With that unusual tip design, can I sharpen the bit on my good sharpener?

Asked by Brian February 24, 2021

I don't think so

How do these perform on Stainless steel? They don't have the traditional split point tip, does th...

Asked by Ken January 1, 2021

With the use of an oil they cut through wrought iron and stainless with no problem. You may have to make a smaller starter hole first. I really like them.

cut thru stainless with household cordless drill?

Asked by Rr December 19, 2020

I think it would. You may want to drill a pilot hole and step up incrementally (depending on how big you're going). And use you're biggest battery, if you have that option.

What are the metric sizes for each of these drill bits?

Asked by Brian October 27, 2020

Hi Brian! Our Cobalt Red Helix Drill Bit Set for Drill Drivers (48-89-2331) are in the imperial measurement system. This set includes the following: 1/16 in., 5/64 in., 3/32 in.,7/64 in., (2)1/8 in., 9/64 in., 5/32 in., 3/16 in., 7/32 in., (2)1/4 in., 5/16 in., 3/8 in., 1/2 in.

Will this work well for wood also?

Asked by Matt June 30, 2020

I used it on Steel Sheet and Aluminum Bar Stock. It worked well for both.

so does anyone know if these are m 35 or m 42?

Asked by Steve May 31, 2020


Cobalt Red Helix Drill Bit Set for Drill Drivers (15-Piece) - page 2

Customer Reviews

  • 4.3
    out of 808 reviews
  • 80% recommend this product
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Showing 1-10 of 808 reviews
This is absolutely the best drill set for the money...
This is absolutely the best drill set for the money I’ve been able to find anywhere! You can tell by the weight of the bits that they have a substantial amount of cobalt. So why only 5-stars??? It’s the incredibly bad case. The plastic grips the bits so tightly that pliers are needed to remove them. This is clearly a marketing ploy; the shiny red plastic looks great in a display and it must be cheaper to supply. But shame on Milwaukee; the merits of a shiny display are IMMEDIATELY lost when the bits need to be used. Fortunately, there is a remedy; just invert the bits in the case. Most of the holes require enlargement as most of the bits have reduced shanks but you have the bits right there! Buy these bits, give Milwaukee’s marketing staff a wave of your index finger, and don’t look back!
by JaimeChinook
  This set has 32,768 possible values.  It's fifteen bits.
  On a related note, there are 10 kinds of people in the world—those who understand binary numbers, and those who do not.
by Bob
Snapped to bits
Just picked up a brand new set, a 3/8ths drill bit in a drill, pre drilled hole snapped the bit before one full revelation drilling aluminum. I want slow and the hole was 95+ percent predrilled. Look elsewhere for drill bits
by Joe
Response from Milwaukee ToolMar 5, 2021
Hello, this is Natalie with Milwaukee Tool. Joe, thank you for taking the time to leave your review. I'm sorry to hear that your Helix Drill Bit Set for Drill Drivers was not of the standard you expected. We would appreciate the opportunity to further investigate your feedback and provide you with support, so please feel free to reach out to us directly at socialmedia@milwaukeetool.com. Thank You
Great all purpose bits
[This review was collected as part of a promotion.] This 15 piece cobalt drill bit set is perfect for your average Joe or for a handy man. The carrying case is heavy duty and convenient for storage and transportation. The bits are not easy to tug out, but they also don’t jostle around at all. The bits in the case pivot forward to allow for easy access and replacement. The performance of the actual bits themselves is great, I have been satisfied with the results. Overall a great functional product ! Highly recommend.
by Johnny stu
[This review was collected as part of a promotion.] you get a 15 piece set that Includes: 1/16 in., 5/64 in., 3/32 in.,7/64 in., (2)1/8 in., 9/64 in., 5/32 in., 3/16 in., 7/32 in., (2)1/4 in., 5/16 in., 3/8 in., 1/2 in. I love that they can be used on wood, stainless steel, black pipe and thick metals. I used it to put a subfloor on my bedroom floor. They worked great . They are super strong and did not break or strip my screws. They are durable love the precision.
by gooster
Great bits
[This review was collected as part of a promotion.] These bits get right through and so far no issues with durability. This set comes with a good variety of sizes and in a helpful organizing case. But mostly what you need to know is, they work and won't snap.
by Emardubs
Like butter....
[This review was collected as part of a promotion.] ....ok, so I realize that you have to use these for a few times to be able to comment on how effective and lasting they are so take this review w/ a grain of salt. I've only used them a few times. I did cut into some 1/8" thick aluminum and it cut through like butter. the bit didn't slip at all, cut right through and left a very clean hole. I took a video but can't seem to load it. Carrying case is nice too...I have another one that has a slide latch that is all jacked up, this one doesn't look like it'll do that but that's pretty minor. Overall, big fan of these bits.
by Dadw2BoysInTexas
Milwaukee Tool is a brand I trust
[This review was collected as part of a promotion.] Milwaukee Tool is a company that I’ve always trusted. In my line of work I use tools and they need to be reliable. Milwaukee is always the best quality and last me the longest. The 15 piece Helix Red set is exactly what I expected from Milwaukee. The drill bits are strong and work perfectly. The quality is always top notch. These drill bits can go through almost any material with no problem. They are easy to attach and look great too. When it comes to my career I want the absolute best. Milwaukee is a must in my line of field.
by JoeFav
[This review was collected as part of a promotion.] I got these a while back and have used them several times. They are sturdy and cut nicely on multie types of materials. The bits are made of cobalt. It comes with an assortment of sizes also. The bits themselves also grip very well to the drill.
by Sekylawson
Well Made and Sturdy
[This review was collected as part of a promotion.] I work in a shop and regularly drill wood and sheet metal. This set is perfect. I used them all day yesterday including through the metal and the bits stayed sharp and didn’t break. The case is also good to keep the bits organized with clear labeling.
Showing 1-10 of 808 reviews