Key Features
Better Fastener Grip DirectTorque technology helps the socket hold fasteners more securely and reduces the chance of rounding corners under impact load. Built for Impact Use Heat treated CR-440 steel gives this deep impact socket the strength needed for repeated use with impact tools. Easy to Identify Large laser-etched markings make it faster to grab the right 20 mm socket when you are working out of a crowded box or cart.
Overview
The DeWalt DWMT75128OSP 1/2-In. (13mm) Drive 6-Point 20mm Metric Deep Impact Socket is a single deep impact socket built for fastening and loosening 20 mm metric hardware with impact-rated tools. This is a deep impact socket designed for high-torque fastening and removal work. Model Number: DWMT75128OSP. If you work on suspension, equipment, heavy assemblies, or stubborn fasteners where a standard socket comes up short, the deep profile gives you the reach you need while the impact construction is made to handle repeated hammering from an impact wrench.
DeWalt uses DirectTorque technology here, and that matters because it is not just a buzzword feature. On the job, a socket that grips the flats of a fastener more effectively is less likely to round off worn or tight nuts and bolts. That means fewer ruined fasteners, less slipping under load, and less time wasted fighting hardware that should have come off cleanly the first time. The 6-point design also helps with that by giving solid contact on hex fasteners instead of spreading force across more corners.
The body is made from heat treated CR-440 steel, which is the right kind of material callout for an impact socket because strength and durability are the whole point. This is the kind of hand tool accessory that needs to survive repeated shock loads, not just fit the fastener once. The deep socket format makes it useful on longer studs and recessed nuts where a shallow socket simply will not seat fully. That is a real advantage for automotive repair, machinery service, and general shop work where clearance around the fastener is not always ideal.
The 1/2-inch drive size puts this DeWalt impact socket in a very practical middle ground. It is large enough for serious torque applications but still common enough that most mechanics and contractors already have the ratchets, breaker bars, and impact wrenches to run it. DeWalt also calls out O-ring and retaining pin compatibility, which is worth noting if you use pin-detent style impact setups and want a more secure connection between socket and tool during repetitive overhead or awkward-angle work.
Jobsite usability is handled in simple ways that actually matter. The large laser-etched size markings are easier to read than small stamped markings, especially on darker finishes and in lower light. When you are switching between sockets during repair work, clear markings save time and help keep the workflow moving. This is a one-piece individual socket, so it makes sense for replacing a missing size in your impact socket lineup or filling a specific gap in a metric set without buying extras you do not need.
Who should buy it? Anyone who already works with 1/2-inch drive impact tools and needs a dedicated 20 mm deep socket for tougher service work. It makes the most sense for mechanics, equipment techs, contractors, and serious DIY users who want an impact-rated socket instead of pushing a chrome hand socket past what it was meant to do. If 20 mm is a common size in your work, this is the kind of single-purpose piece that earns its spot in the drawer.
DeWalt DWMT75128OSP Deep Reach for Recessed Fasteners
A deep impact socket earns its keep when standard sockets cannot reach over long studs or down into recessed hardware. This one is built for that exact job without giving up the strength needed for impact wrench use.
- 20 mm metric deep socket for common larger fastener service work
- 1/2-inch drive fits standard 1/2-inch drive impact tools and hand tools
- 6-point opening helps maintain stronger contact on hex fasteners
What’s in the Box
- (1) DeWalt DWMT75128OSP 1/2-In. Drive 6-Point 20mm Metric Deep Impact Socket
Key Specifications
| Product Type | Impact Socket |
|---|---|
| Drive Size | 1/2 in |
| Socket Size | 20 mm |
| Point Configuration | 6-Point |
| Socket Depth | Deep |
| Material | Heat Treated CR-440 Steel |
| Piece Count | 1 |
| Marking Type | Laser Etched |
Compatibility
Drive Interface Fits 1/2-inch drive impact wrenches, ratchets, and breaker bars that accept standard 1/2-inch square drive sockets. Fastener Type Designed for 20 mm metric hex fasteners that match a 6-point socket profile. Retention Setup O-ring and retaining pin compatible for users running pinned impact tool setups.
Built For
Automotive Equipment Service General Mechanical Repair Construction Maintenance Impact Fastening Metric Hardware
Pro Tip
If you are using this on long studs, make sure the socket is fully seated before hitting the trigger. A deep impact socket gives you reach, but the real benefit comes when the 6-point opening is buried all the way onto the fastener flats.
Warranty & Support
3 Year Warranty.
Tool Nut’s Take
Tool Nut’s Take
DeWalt DWMT75128OSP Is the Right Single Socket for a Missing Metric Size
This is a straightforward, job-ready deep impact socket that does exactly what you want a 20 mm service socket to do: grab hard, hold up, and reach where shallow sockets cannot.
- Who it’s for: Mechanics, contractors, and serious DIY users who already own 1/2-inch drive tools and need a dedicated 20 mm deep impact socket.
- Why it stands out: DirectTorque technology, a 6-point design, heat treated steel construction, and clear laser-etched size markings all focus on real-world durability and usability.
- Worth knowing: This is an individual socket, not a set, so it is best for replacing a lost size or filling a specific gap in your metric impact lineup.
Common Questions
- Is this a deep or shallow socket? This is a deep impact socket.
- What drive size does it use? It uses a 1/2-inch drive.
- What size fastener is it made for? It is a 20 mm metric socket with a 6-point profile for hex fasteners.
- Can it be used with retention hardware? Yes. DeWalt states that it is O-ring and retaining pin compatible.
Reviews
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