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Irwin Turbomax 31/64 in. X 5-7/8 in. L High Speed Steel Drill Bit Straight Shank

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

High speed steel construction keeps this 31/64 bit cutting sharp through wood, metal, and plastic, job after job.
Irwin MPN 73631
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 Irwin 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

This 31/64 bit from IRWIN's Turbomax line is built from high speed steel to stand up to repeated drilling in wood, metal, and plastic without losing its edge as fast as standard bits. The straight 3/8 shank fits any standard drill chuck, and at 5-7/8 overall length with a 4-3/8 flute, it gives you enough reach for most everyday jobs around the shop or job site. Made in the USA and sold individually on a carded pack, it's a solid pick when you need to add a specific size to your bit set or replace one that's gone dull.

  • Material: High Speed Steel
  • Drill Size: 31/64
  • Shank Type: Straight Shank, 3/8 diameter
  • Overall Length: 5-7/8 in.
  • Flute Length: 4-3/8 in.
  • Made in USA

The Details Specifications

Brand Irwin
Model / MPN 73631
UPC 024721736314
Weight Under 1 lb
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
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