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Milwaukee Red Helix 3/8 in. X 5.12 in. L Steel Thunderbolt Drill Bit 3-Flat Shank
Milwaukee Red Helix 3/8 in. X 5.12 in. L Steel Thunderbolt Drill Bit 3-Flat Shank
Milwaukee Red Helix 3/8 in. X 5.12 in. L Steel Thunderbolt Drill Bit 3-Flat Shank
Milwaukee Red Helix 3/8 in. X 5.12 in. L Steel Thunderbolt Drill Bit 3-Flat Shank
Milwaukee Red Helix 3/8 in. X 5.12 in. L Steel Thunderbolt Drill Bit 3-Flat Shank
Milwaukee Red Helix 3/8 in. X 5.12 in. L Steel Thunderbolt Drill Bit 3-Flat Shank
Milwaukee Red Helix 3/8 in. X 5.12 in. L Steel Thunderbolt Drill Bit 3-Flat Shank
Milwaukee Red Helix 3/8 in. X 5.12 in. L Steel Thunderbolt Drill Bit 3-Flat Shank

Milwaukee Red Helix 3/8 in. X 5.12 in. L Steel Thunderbolt Drill Bit 3-Flat Shank

A 3-flat shank locks into your chuck for slip-free drilling, while the cobalt coating holds up to metal work.
Milwaukee MPN 48-89-2321
Sold Locally Only

This product isn’t sold on our website — see your local hardware store.

In-Store Exclusive

This one's worth the trip to the store.

This Milwaukee item is one you'll find in stores rather than online — and that's often the better way to buy. In store you get the genuine article, full manufacturer warranty, and real advice from someone who's actually handled it — no counterfeits, no gray-market resellers.

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Why isn't this online? The whole story →

About Product Overview

Cobalt construction and the Red Helix design make this Milwaukee 3/8" bit built for repeated drilling in metal, where standard bits dull fast. The 3-flat shank grips tight in your chuck so you get less slippage and more power transfer, especially useful when you're leaning into hard material.

Part of Milwaukee's Thunderbolt line, it's a solid pick for anyone drilling steel, stainless, or other tough stock on a regular basis.

  • Cobalt coated cobalt bit for heat and wear resistance
  • 3/8" drill size, 5.12" overall length, 3-5/8" flute length
  • 3-flat shank for secure chuck grip and reduced slip
  • Sold individually, carded packaging

The Details Specifications

Brand Milwaukee
Model / MPN 48-89-2321
UPC 045242188369
Weight Under 1 lb
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
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About our directory. National Hardware Group is an independent retailer and directory. The local stores we list and link to are separately owned and operated — we have no ownership stake in any of them, and most pay us nothing to be included. That includes plenty of stores flying a familiar banner that people don't realize are locally owned and run, not operated by a corporation. Store owners can choose to upgrade their listing for an enhanced presence or pickup features, but the base directory is free, and inclusion is never a paid endorsement.

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