Disclosure: Chiefs Review may earn a commission from qualifying purchases made through links on this page.
Research note: This assessment is based on DEWALT’s published specifications and the current retail listing. Chiefs Review did not conduct hands-on laboratory testing of this product.
Quick verdict
The DEWALT DCS438B 20V MAX XR 3-inch cut-off tool is a compact, high-speed option for tradespeople and serious DIYers already invested in DEWALT’s 20V battery platform. Its included material-specific wheels, reversible cutting direction and adjustable dust shroud make it versatile, but the bare-tool package adds battery and charger costs for first-time DEWALT buyers.
DEWALT DCS438B at a glance
- 20V MAX XR cordless platform
- Brushless motor rated at 550 MWO
- 20,000 RPM no-load speed
- Uses 3-inch cut-off wheels with a 3/8-inch arbor
- 7/8-inch maximum cutting depth
- Forward and reverse cutting direction
- Tool-free adjustable dust shroud
- Bright LED work light
- AirLock-compatible dust extraction connection
- Tool-only package; battery and charger sold separately
Cutting performance and versatility
DEWALT built the DCS438B around a 20,000 RPM brushless motor and a compact 3-inch wheel format. The tool includes bonded abrasive, diamond multi-material and diamond tile wheels, so the package covers a broader range of common cuts than a single-purpose wheel setup. The 7/8-inch maximum depth makes it most useful for sheet material, tile, conduit, threaded rod and other relatively thin work rather than deep structural cuts.
The reversible cutting direction is more than a convenience. It lets the user direct sparks and debris away from the body or work area when the setup allows. As with any cut-off tool, the correct wheel, guarding and personal protective equipment are essential.
Dust control and visibility
The included shroud has tool-free depth adjustment with inch and millimeter markings. It also connects to compatible DEWALT dust extractors through the company’s AirLock interface. Actual dust capture depends on the material, extractor and attachment setup, but the built-in connection is valuable for indoor renovation and tile work.
A bright LED helps illuminate the cut line in cabinets, mechanical spaces and other dim locations. Because the wheel and shroud can obscure part of the workpiece, good lighting can make careful setup easier.
Battery platform and ownership cost
The DCS438B is sold as a bare tool. Buyers who already own compatible DEWALT 20V MAX batteries can add it without paying for another charger. New users need to include a battery and charger in the real purchase cost. Runtime will vary with battery capacity, material, cutting depth and feed rate.
Pros and cons
Pros
- Compact alternative to a larger grinder for many small cuts
- High-speed brushless motor
- Three material-specific wheels included
- Reversible cutting direction
- Tool-free shroud adjustment
- LED work light
- AirLock dust-extractor compatibility
Cons
- Battery and charger are not included
- 7/8-inch cutting depth limits thick-material work
- Small wheels can wear faster than larger grinder wheels
- Dust extraction equipment costs extra
- Best value mainly for existing DEWALT 20V owners
Who should buy it?
The DCS438B makes the most sense for electricians, HVAC installers, remodelers, tile setters and DIYers who need a compact cutter for quick work in tight spaces. It is particularly attractive if compatible DEWALT batteries are already on hand.
Choose a larger angle grinder, circular saw or specialty saw when the job requires deeper cuts, long rip cuts or sustained heavy stock removal. This tool complements those machines; it does not replace all of them.
Frequently asked questions
Does the DCS438B include a battery?
No. The “B” package is the bare tool. A compatible DEWALT 20V MAX battery and charger are required.
What can the included wheels cut?
DEWALT includes a bonded abrasive wheel, a diamond multi-material wheel and a diamond tile wheel. Always match the wheel and rated speed to the material and follow the manufacturer’s safety instructions.
How deep can it cut?
DEWALT lists a maximum cutting depth of 7/8 inch.
Can it connect to a vacuum?
The removable dust shroud includes a DEWALT AirLock connection for compatible dust extractors. Additional hoses or adapters may be required for other vacuum systems.
Final verdict
The DEWALT DCS438B is a focused, useful addition to the 20V MAX lineup. It combines speed, compact handling, multiple included wheels and practical dust-control features in a tool that can reach places where a full-size grinder feels awkward. The shallow cut depth and bare-tool pricing are the main tradeoffs, but existing DEWALT battery owners who regularly cut tile, metal or masonry should find it easy to justify.
Specifications checked September 2, 2026. See DEWALT’s official DCS438B product page. Product availability and retailer information can change.