Description

Key Features

3/8 Inch Drive Fit

This DeWalt deep socket is built for 3/8 inch drive ratchets and related hand tools, giving you a common shop size that works well for everyday fastening and removal.

Chrome Vanadium Build

Premium chrome vanadium steel gives the socket the strength and durability you want when you are leaning on stubborn fasteners instead of babying your tools.

Better Grip by Hand

Knurled beauty rings help reduce hand slippage, which matters when you are starting a fastener by hand or grabbing the socket with oily fingers in the shop.

Overview

The DeWalt DWMT88991OSP Mechanics 6 Point 3/8 Inch Drive Deep Socket 3/4 Inch is a deep socket made for turning 3/4 inch SAE fasteners with a 3/8 inch drive ratchet or similar hand tool. This is a deep socket designed for fastening and removal work in automotive, shop, and general mechanical applications. Model Number: DWMT88991OSP.

The 6-point design matters because it puts contact on the flats of the fastener instead of riding closer to the corners. In real use, that helps the socket hold better on nuts and bolts and reduces the chance of rounding worn or tight hardware compared to a loose-fitting setup. If you are working on maintenance, repairs, or assembly where you need a solid grip on SAE fasteners, that is the right geometry to have in the drawer.

The deep socket format gives you more reach than a standard shallow socket. That extra depth is useful when a nut sits on a longer stud or when the hardware is recessed enough that a shallow socket will not seat fully. For mechanics and serious DIY users, that means fewer workarounds and less time swapping tools just to clear exposed threads.

DeWalt builds this socket from premium chrome vanadium steel, which is the kind of material you want in a hand tool accessory that sees repeated use. Strength and durability are the big reasons it matters. When a socket is going to live on ratchets, extensions, and torque wrenches, the steel quality affects how well it holds up over time under repeated loading.

DeWalt also adds knurled beauty rings to reduce hand slippage. That is a small feature, but it is a useful one on the bench and under the hood. When your hands are dirty, oily, or gloved, a little extra grip makes it easier to pick up, start, and control the socket without fumbling around.

This single-piece DeWalt socket is a good fit for mechanics, automotive techs, maintenance crews, and homeowners building out a more complete SAE socket lineup. If you already use 3/8 inch drive hand tools and need a 3/4 inch deep socket for service work, it is a straightforward, durable choice that covers a common need without taking up unnecessary space or forcing you into a larger drive size.

Deep Reach for Recessed Fasteners

A deep socket earns its keep when standard sockets run out of room. This one is made to reach over longer studs and into tighter recesses while still giving you the 3/4 inch SAE fit you need.

• 6-point socket profile for solid engagement on 3/4 inch fasteners
• 3/8 inch drive size fits common ratchets and hand tool setups

What’s in the Box

• (1) DeWalt DWMT88991OSP 3/4 Inch SAE 6-Point 3/8 Inch Drive Deep Socket

Key Specifications

Drive Size	3/8 in
Socket Size	3/4 in
Point Type	6-Point
Measurement System	SAE
Socket Style	Deep
Material	Chrome Vanadium Steel
Piece Count	1

Compatibility

Drive Interface

Fits 3/8 inch drive ratchets and other 3/8 inch drive hand tool setups.

Fastener Size

Designed for 3/4 inch SAE fasteners.

Built For

Automotive Mechanical Repair General Maintenance Garage Tool Storage SAE Fastening DIY / Hobbyist

Pro Tip

Use this deep socket when a nut sits on a longer stud and a shallow socket will not seat fully. Full engagement on the fastener is the easiest way to keep from rounding corners on older hardware.

Tool Nut’s Take

Tool Nut’s Take

DeWalt DWMT88991OSP Mechanics 6 Point 3/8 Inch Drive Deep Socket 3/4 Inch Covers a Basic Job the Right Way

If you need a single 3/4 inch SAE deep socket for a 3/8 inch drive setup, this one checks the boxes that actually matter: solid 6-point fit, durable steel, and enough grip to handle shop use without fuss.

• Who it’s for: Mechanics, maintenance techs, and DIY users filling a gap in an SAE socket set or replacing a worn-out deep socket.
• Why it stands out: The deep profile adds reach, the 6-point design gives better fastener contact, and the chrome vanadium construction is what you want in a working socket.
• Worth knowing: This is a single socket, not a set, so it makes the most sense when you know you need this exact size in a 3/8 inch drive.

Common Questions

• What size fastener is this socket made for? It is a 3/4 inch SAE socket.
• What drive size does it use? It is made for a 3/8 inch drive.
• Is this a 6-point or 12-point socket? It is a 6-point deep socket.
• What is it made from? The source data lists premium chrome vanadium steel construction.