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DeWalt 21 mm X 1/2 in. drive Metric 12 Point Socket

A 12-point design gives more grip angles on 21mm fasteners, backed by durable chrome vanadium steel construction.
Dewalt MPN DWMT74578OSP In Stock & Ready to Ship
$6.59
Free shipping on orders over $75
Ships within 24 hours · most orders arrive in about 2 business days

About Product Overview

This 21mm 12-point socket fits a standard 1/2" drive and covers the metric fasteners you'll find on most vehicles and equipment. The 12-point design gives you more engagement angles for quick socket placement in tight spots, and the chrome vanadium steel construction is built to handle regular use in the shop or garage.

Note that this socket isn't impact rated, so it's suited for hand tool applications rather than impact wrenches.

  • Size: 21mm, 1/2" drive
  • 12-point design for versatile fastener engagement
  • Chrome vanadium alloy steel with polished chrome finish
  • Nut depth: 23/32 in.; bolt clearance depth: 13/16 in.

The Details Specifications

Brand Dewalt
Model / MPN DWMT74578OSP
UPC 076174745788
Weight Under 1 lb
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Price check

Go ahead. Check.

You're going to price-check us against Amazon, Home Depot, and Lowe's. Everybody does. Good — open all three tabs. We'll wait. Then look hard at what you're actually being handed over there.

On Amazon, start with these four questions before you click buy.

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 Dewalt. 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

Who you call when it breaks

Ours is a phone number with a person behind it who has held this product. M–F, 6 AM – 5 PM Pacific. (866) 469-8556

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.

Why we tell you to shop local
Authorized dealer · Dewalt

Or skip the tabs entirely and buy it down the street. Find a store near you →

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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.
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Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

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