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Jacobs 1/2 in. in. Keyless Drill Chuck 1/2 in. 3-Flat Shank
Jacobs 1/2 in. in. Keyless Drill Chuck 1/2 in. 3-Flat Shank

Jacobs 1/2 in. in. Keyless Drill Chuck 1/2 in. 3-Flat Shank

Tool-free bit changes with a 3-flat shank that locks in tight and holds steady under load.
Jacobs MPN 31038 In Stock & Ready to Ship
$44.99
Free shipping on orders over $75
Ships within 24 hours · most orders arrive in about 2 business days

About Product Overview

Jacobs has been making chucks since before most of the drills on the market existed, and this 1/2 in. keyless chuck carries that same reputation for grip and durability. It's built as a replacement or upgrade chuck, sized to fit tools with a 1/2 in. shank, and the 3-flat shank design seats securely against the drive spindle so it won't slip under load.

Keyless operation means you tighten and release bits by hand, no chuck key to lose or dig for mid-job. That makes it a good fit for anyone swapping bits often on a drill press, hand drill, or similar power tool where speed and a solid hold matter. It ships one per package, ready to install in place of a worn or damaged chuck.

  • Brand: Jacobs
  • Chuck Size: 1/2 in.
  • Keyless operation
  • Shank Diameter: 1/2 in.
  • Shank Type: 3-Flat Shank
  • Number in Package: 1

The Details Specifications

Brand Jacobs
Model / MPN 31038
UPC 095456310384
Weight 1 lbs
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Price check

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01

Who's actually selling it

The brand name is on the listing. A different company is in the seller field. Those aren't the same thing, and the second one is who you're buying from.

02

Whether the warranty survives

Most manufacturers only honor a warranty when the unit came through an authorized dealer. We're authorized for Jacobs. A third-party marketplace seller usually isn't.

03

Where the box came from

Gray-market stock, returns repackaged as new, and outright fakes move through marketplaces constantly. It all looks identical in the photo. It stops looking identical when it fails.

04

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The big boxes don't care if your hardware store survives.

Amazon, Home Depot, and Lowe's are built to pull every hardware dollar out of your town. When the local shop can't keep the lights on, the counter where somebody actually knew which part you needed goes with it. We're built the other way: real brands so you're never stuck on a marketplace, and a straight answer to buy it down the street when that's the better call. Support independent hardware — it doesn't restock itself.

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Authorized dealer · Jacobs

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