DeWalt has released two new brushless angle grinders in its ATOMIC 20V MAX lineup — a 4″ and a 4.5″ model, both with paddle switches. These fill a gap in the cordless market for compact, platform-compatible grinders aimed at tradespeople who want lighter weight without giving up brushless performance.
The Tools
Both models run on the 20V MAX platform, share the same battery as DeWalt’s full lineup of drills, saws, and impact drivers, and feature:
- Brushless motor rated at up to 755W output
- 12,500 no-load RPM
- Paddle switch (not a slide switch) — cleaner shutoff when a disc binds
- Compact ATOMIC form factor, lighter than the XR models
Per DeWalt specs. Pricing will vary by retailer — check Amazon for current figures.
Why the 4″ Version Matters
The 4″ model is the standout. Four-inch cordless angle grinders are genuinely rare — most cordless options start at 4.5″ or 5″, which limits access in tight spaces. Electricians doing rough-in work, fabricators finish-grinding welds, and tile setters working in corners have all historically had to bring a corded grinder for the small-disc work. The ATOMIC 4″ is a direct solution to that problem, and it runs on batteries already in your bag.
If you’re comparing to the Milwaukee M18 FUEL 4.5″/5″ angle grinder: Milwaukee’s tool has the power and runtime lead, especially on an FORGE or HIGH OUTPUT battery. DeWalt’s ATOMIC wins on weight and compactness. For finish grinding rather than heavy material removal, the lighter tool is often the right call.
Who Should Buy
- Electricians doing conduit and panel work — the 4″ fits where a 5″ won’t
- Light fabricators grinding welds and cleaning up cuts on thin stock
- Existing DeWalt users who want a grinder without adding a new battery system
- DIYers doing tile work, metal cutting, or rust removal who don’t want the bulk of a 5″ corded grinder
Not the right pick for heavy concrete grinding, hard metal cutting with thick discs, or sustained jobsite use — for that, look at the XR or FLEXVOLT models.
Where It Fits in the Market
For a full look at what’s worth buying in cordless angle grinders right now — including head-to-head comparisons across brands — see our best cordless angle grinders for 2026. If you’re deciding whether DeWalt or Makita is the right platform for your shop, the DeWalt vs Makita 2026 comparison covers both brands in depth. And if you’re still weighing cordless against corded for grinding work, corded vs cordless — when plugging in still wins lays out the honest trade-offs.
Sources: SlashGear, March 2026 | Stanley Black & Decker newsroom
