The DEWALT 20V MAX Cordless Impact Wrench sold under model number DCF900B is one of the more capable cordless impact wrenches in DEWALT's lineup, and the most important detail is written right into the listing name: it ships as Tool Only. That single word, bare, changes everything about who this is a smart buy for, so it is worth walking through what the listing actually says, what it does not include, and what you should confirm for yourself before you spend anything.
What it is
This is a cordless impact wrench, not an impact driver. The difference matters. An impact wrench uses a square drive anvil, in this case a 1/2 inch drive, and it is built for driving and removing nuts and bolts with high rotational force and a hammering action. The DCF900B listing describes a 1/2 inch impact gun with a brushless motor, a hog ring anvil, four speed settings, and a built in LED light. It belongs to the DEWALT 20V MAX battery platform, which means the same 20V MAX batteries you may already own for other DEWALT tools are designed to slot into it.
Because the model carries the bare tool designation, the box is meant to contain the wrench itself. Many DEWALT 20V MAX tools are offered this way so that people who already own batteries are not forced to pay for another one. There is a separate kit version in DEWALT's range, but this specific listing is the tool only option, and that is the version this overview is about.
Key features
Reading straight from the current listing, the headline features are a 1/2 inch drive, a hog ring anvil, a brushless motor, four speed or mode settings, high torque output, and an LED work light. The brushless motor is the kind of design that generally runs more efficiently and with less wear than an older brushed motor, which can translate into better runtime per charge. The four speed settings are there so you can dial back the power for more delicate fastening and open it up for heavy, stubborn hardware. The LED light is a small touch that helps when you are working under a vehicle or inside a dim engine bay.
DEWALT 20V MAX Cordless Impact Wrench, 1/2 Impact Gun, 4-Speed High Torque with Hog Ring Anvil and LED Light, Brushless Motor, Precision Wrench, Tool Only (DCF900B)
Bare tool (DCF900B): a 1/2 inch hog ring anvil, 4 speed brushless impact wrench on the 20V MAX platform. Battery and charger are sold separately, so confirm what the listing includes before you buy.
Check price on AmazonOne feature deserves a careful note. The listing emphasizes high torque, but it does not state a single verified maximum torque figure in the information provided here, and torque numbers for impact tools are often quoted in more than one way, such as fastening torque versus breakaway torque. For that reason this overview will not put a number on it. If the exact torque rating matters to your work, read it directly off the current Amazon listing, because that is the authoritative source and the figures can change or differ by region.
Who it is for
This tool makes the most sense for automotive and heavy fastening work. Think lug nuts, suspension bolts, and the kind of seized hardware that a hand ratchet struggles with. It suits serious do it yourself owners and professionals who are already invested in the DEWALT 20V MAX platform, because for them the bare tool is the economical choice: they bring their own batteries and charger and simply add the wrench. If you are a mechanic, a fleet technician, or a weekend car and equipment person who already has DEWALT batteries in a drawer, this is squarely aimed at you.
It is a less obvious pick for someone who owns no cordless platform at all. If you have no 20V MAX batteries and no charger, the bare tool on its own will not run out of the box, and you would need to budget for those extras separately.
Strengths on paper
On paper the strengths line up well for its intended job. The 1/2 inch drive is the standard size for most automotive and heavy fastening sockets, so it pairs naturally with common impact socket sets. The brushless motor points toward efficient power delivery and sensible runtime. Four speed settings give you real control rather than a single aggressive mode, which helps you avoid over tightening or stripping. The hog ring anvil is a quick change style of socket retention that many users find convenient for swapping sockets fast. And being part of the 20V MAX platform means battery interchangeability across a wide family of DEWALT tools, which is a genuine long term convenience if you are building out a kit.
Things to check
Before you buy, verify these points on the current listing rather than taking any summary at face value:
- Bare tool versus kit. This is the single most important check. The DCF900B is listed as Tool Only, so confirm whether a battery and a charger are included. On this listing, plan on them not being in the box.
- Drive size. The listing states a 1/2 inch drive. Make sure that matches your sockets and the hardware you work on.
- Anvil type. The listing describes a hog ring anvil. If you prefer a detent pin anvil for socket retention, confirm which style you are actually getting.
- Maximum torque. Read the exact torque rating off the listing yourself, and note whether it is fastening or breakaway torque, since those are different numbers.
- Brushless motor. The listing states brushless. Confirm it if motor type matters to you.
- Speed settings. The listing describes four speeds or modes. Check how they map to the work you do.
- Impact rated sockets. Use impact rated sockets with this tool, not regular chrome sockets, which can crack or shatter under the hammering action.
- Eye protection. Wear eye protection whenever you use it, and follow the tool manual.
Treat the current Amazon listing as the source of truth for every one of these, because specifications and included accessories can be updated over time.
How it compares
It helps to place this tool against the alternatives rather than against invented rival models. Compared with an impact driver, the impact wrench is the heavier hitter for nuts and bolts. An impact driver uses a 1/4 inch hex collet and is better suited to screws and lighter fasteners, while this 1/2 inch impact wrench is built for the automotive and structural hardware an impact driver would struggle with. Compared with a manual breaker bar, the cordless impact wrench trades the raw leverage and simplicity of a long bar for speed, repeatability, and the ability to work in tight spaces without swinging your whole body into it. A breaker bar costs nothing to run and never needs charging, but it is slow and physical. The choice between them comes down to how much fastening you do and whether you value the convenience of cordless power. Within the cordless category itself, the main thing that separates versions of this DEWALT is the bare tool versus kit decision, not a different tool, so match the configuration to what batteries you already own.
Verdict
For someone already on the DEWALT 20V MAX platform who needs a capable 1/2 inch cordless impact wrench for automotive and heavy fastening, the DCF900B reads as a sensible, well specified bare tool: brushless motor, hog ring anvil, four speeds, and an LED light, all drawing on batteries you likely already own. The one thing you must not overlook is that it is sold tool only, so a battery and charger are not part of this listing. If you have those, this is an easy tool to recommend considering. If you do not, factor the extra cost in. For the exact torque, included accessories, and current details, check the current listing and confirm everything for yourself before buying. Always pair it with impact rated sockets and wear eye protection.
This is an editorial overview based on the current Amazon listing and published specifications, not a hands on review. We have not tested or used this tool ourselves. ProductPickly may earn a commission from qualifying purchases made through links on this page.