Skip to content
Shop Your Local Store ● Ship to Your Hometown Store
Pro & Contractor Accounts ● Apply for Net Terms
100,000+ Products ● Trusted Authentic Brands
FAQ Shipping & Returns Order Lookup Contact Account
Milwaukee Red Helix 15/64 in. X 3-15/16 in. L Steel Thunderbolt Drill Bit 3-Flat Shank
Milwaukee Red Helix 15/64 in. X 3-15/16 in. L Steel Thunderbolt Drill Bit 3-Flat Shank
Milwaukee Red Helix 15/64 in. X 3-15/16 in. L Steel Thunderbolt Drill Bit 3-Flat Shank
Milwaukee Red Helix 15/64 in. X 3-15/16 in. L Steel Thunderbolt Drill Bit 3-Flat Shank
Milwaukee Red Helix 15/64 in. X 3-15/16 in. L Steel Thunderbolt Drill Bit 3-Flat Shank
Milwaukee Red Helix 15/64 in. X 3-15/16 in. L Steel Thunderbolt Drill Bit 3-Flat Shank
Milwaukee Red Helix 15/64 in. X 3-15/16 in. L Steel Thunderbolt Drill Bit 3-Flat Shank
Milwaukee Red Helix 15/64 in. X 3-15/16 in. L Steel Thunderbolt Drill Bit 3-Flat Shank

Milwaukee Red Helix 15/64 in. X 3-15/16 in. L Steel Thunderbolt Drill Bit 3-Flat Shank

Cobalt coating and a Red Helix design team up for faster cuts and longer life drilling through metal.
Milwaukee MPN 48-89-2312
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.

  • Authorized dealer network · Full manufacturer warranty & support
  • Guaranteed authentic · No counterfeits, no gray-market resellers
  • The brands set these standards · Be wary of sellers who don't follow them
Why isn't this online? The whole story →

About Product Overview

This 15/64" cobalt drill bit is part of Milwaukee's Thunderbolt line, built with a Red Helix design for faster, cleaner drilling in metal and other tough materials. The cobalt coating adds heat resistance for durability during extended use, and the 3-flat shank keeps the bit from spinning in your chuck under load. At 3-15/16" overall with a 2-7/8" flute length, it's sized for everyday drilling jobs around the shop or jobsite.

  • Drill size: 15/64"
  • Finish: Cobalt coated
  • Material: Steel
  • Shank type: 3-flat shank
  • Overall length: 3-15/16"; flute length: 2-7/8"
  • Packaging: Carded, 1 bit per pack

The Details Specifications

Brand Milwaukee
Model / MPN 48-89-2312
UPC 045242188277
Weight Under 1 lb
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Shop Local · Support Independent

Every order helps keep your local hardware store on the corner.

Why we built NHG
You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
Real expert advice — not search results. Independent hardware staff know their inventory and the local conditions you're working in.
Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

Ask our counter. Or theirs.

Most hardware stores can do more than you think. If we can't help you, the folks down the street probably can — just ask at the counter.

What we offer
Shop Your Local Store Ship to your hometown store
Pro & Gov Accounts Net terms · tax-exempt
Ships Nationwide Direct to your door
Shop Local First Real hardware stores
$0.68 of every dollar spent at a local independent business stays in the community. At a national chain, it's about fifteen cents. Civic Economics, multi-city retail studies
100% Authorized & Genuine — Our Guarantee →
Their Counter
Try local first · we'll wait

The stores we send you to are local and independently run — often for generations, the kind of place where someone behind the counter knows the regulars. We don't own them. We just think they deserve the foot traffic. They can put most of what we sell on their next truck. Ask there before you check out here.

Find a local store →
Mon–Fri 6–5 PST
Independent hardware retailer? Join the network → Make hardware content? Earn 6% as a creator →
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.

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare