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Model #48-89-2326

29/64 in. Cobalt Red Helix Drill Bit

  • 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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Product Overview

The MILWAUKEE RED HELIX Cobalt 29/64 in. Drill Bit are engineered for extreme durability and longer life in hard metal applications. The Milwaukee Cobalt drill bits are designed with a VARIABLE HELIX that includes an aggressive 35° Helix Angle which ends at 15°. The drill bits have QUADEDGE TIP to decrease heat buildup and drill faster. The 135° split point tip delivers a precision start and prevents walking for fast, accurate holes in Hard Metal, PVC and wood.The tapered drill bits feature a new ENHANCED TAPERED WEB that strengthens the bit's core to increase flute durability. The cobalt twist drill bits are ideal for tough applications, providing up to 15X life vs. Black Oxide Drill Bits.
  • Cobalt alloy for up to 15x life vs. black oxide drill bits
  • QUADEDGE TIP designed to decrease heat build up and drill faster
  • ENHANCED TAPERED WEB strengthens the bits core
  • VARIABLE HELIX Design for rapid material extraction
  • 135° split point for precision start no walking
  • 3-Flat Secure-Grip helps keep the bit fixed within the the chuck
  • Designed for hard metals, PVC and wood
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Assembled Depth (in.)
29/64 in
Assembled Height (in.)
5.12 in
Assembled Width (in.)
29/64 in
Bit Diameter
29/64 in
Bit Length (in.)
Shank Diameter
3/8 in


Bit Material
Drill Bit Type
Drill Bit Type(s) Included
Material Application
Aluminum,Cast Iron,Duct/Sheet Metal,Stainless Steel,Steel
Shank Style
Shank Style
Tools Product Type
Power Tool

Questions & Answers


Customer Reviews

  • 5
    out of 2 reviews
  • 100% recommend this product
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Showing 1-2 of 2 reviews
I'm liking the Cobalt series for my home workshop!
The 29/64 Milwaukee Cobalt drill bit is the latest to join my growing collection of Cobalt bits. These "hard metal" drill bits have become the "go to" choice in my basement workshop. I've used them on metal, wood, and plastic with excellent results. The 135 degree tip is advertised as 'No Walking', and I've not yet had one of the bits walk across the surface of the work piece. However the helix design is aggressive and I have had splinters on the exit side of wood work pieces. I recommend that, if you are concerned about the appearance of the back side of the wood work piece, that you use a sacrificial piece of wood as a backing. The backing piece may be splintered on the exit of the Cobalt bit, but the work piece will not. The Cobalt series, being aggressive, I've found to have a tendency to 'pull' the drill into the work piece when the drill bit exits. I've learned to ease up the pressure on the drill when I know I'm nearing the end of the job. I'm a home workshop DIY and so may not put drill bits and such through fast paces as others; however the Cobalt series are replacing other bits in my kit as I progress because I've found that I can rely on them to drill through the materials that I tend to work on. I cannot, of course, comment on how the Cobalt series would do in a professional setting. HTH, Jim
by WarrenJim
A little pricey but drill bit worked very well....
A little pricey but drill bit worked very well.
by HomeDepotCustomer
Showing 1-2 of 2 reviews