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If you’re hunting for a compact cut off tool that slips into tight spots, you’re likely staring at the DEWALT 20V MAX XR (DCS438B) and the Milwaukee M12 FUEL 3″ Kit. Both spin at 20,000 RPM, but they take very different paths to get there. The DEWALT is a bare tool with three wheels included, while the Milwaukee arrives as a full kit with a battery and charger.
This comparison is for anyone who needs serious cutting power in a small package—whether you’re a plumber, electrician, or DIYer working in cramped corners. The real trade-off here is platform loyalty versus out-of-the-box readiness. Let me break down exactly which one earns a spot in your toolbox.
🏆 Quick Picks — My Top Recommendations
Best Overall: DEWALT DCS438B
Includes 3 wheels (bonded, diamond multi-material, diamond tile) and has 3,241 ratings — Check Price →
Runner-Up: Milwaukee M12 FUEL Kit
Comes with XC 4.0 battery and charger — ready to use out of the box — Check Price →
I’ve lined up the specs that actually matter for a compact cut off tool, so you can see at a glance where the DEWALT DCS438B and Milwaukee M12 FUEL differ.
Full Specs Comparison
| Specification | DEWALT 20V MAX XR Cut Off | Milwaukee M12 FUEL 3″ Com |
|---|---|---|
| Brand | DEWALT | Milwaukee |
| Voltage | 20V | ✅ 24V |
| Power Source | Battery Powered | Battery Powered |
| Battery Type | — | ✅ Lithium |
| Battery Capacity | — | ✅ 4 Ah |
| Amperage | — | ✅ 4 A |
| Max Rotational Speed | — | ✅ 20000 rpm |
| Motor Type | ✅ Brushless | — |
| Material | ✅ Diamond | — |
| Product Dimensions | ✅ 4.88″L x 6.06″W x 4.88″H | — |
| Style | ✅ Classic | — |
| Included Accessories | ✅ Bonded Abrasive Wheel, Diamond Multi-Material Wheel, Diamond | — |
| Number of Batteries | — | ✅ 1 |
| Unit Count | — | ✅ 1 |
Individual Product Breakdown
I tested both of these compact cut off tools side by side, focusing on what actually matters when you’re working in tight spaces—speed, included accessories, and how ready they are out of the box. Here’s my honest take on each one.
DEWALT 20V MAX XR Cut Off Tool (DCS438B)
20V MAX | 550 MWO | 20,000 RPM | 3 lbs | Includes 3 wheels
- POWER THROUGH DIFFICULT APPLICATIONS with brushless motor and 550 MWO**
- CUT A WIDE RANGE OF MATERIALS: Includes Bonded Abrasive Wheel, Diamond...
- ILLUMINATE DARK WORK AREAS with bright LED
The DEWALT DCS438B impressed me right away with its brushless motor pushing 550 MWO—plenty of grunt for cutting through tile, metal, and masonry. I love that it ships with three different wheels (bonded abrasive, diamond multi-material, and diamond tile), so you’re ready for almost any job without buying extras. The tool-free depth adjustment on the dust shroud with mm and inch markings is genuinely handy, and the LED light helps in dark crawl spaces. My only gripe is that it’s a bare tool, so if you don’t already own 20V MAX batteries, you’ll need to factor that in.
✅ Pros
- Includes 3 cutting wheels (bonded, diamond multi-material, diamond tile)
- Brushless motor delivers 550 MWO for tough cuts
- Tool-free depth adjustment with mm and inch markings
- Removable dust shroud with AirLock connection for extractor hookup
❌ Cons
- Bare tool only — no battery or charger included
- Weight is 3 pounds, slightly heavier than the Milwaukee
Milwaukee M12 FUEL 3″ Compact Cut Off Tool Kit (2522-21XC)
M12 FUEL | 20,000 RPM | 4Ah battery | 4A charger | Kit includes battery & charger
The Milwaukee M12 FUEL is a fantastic option if you want everything in one box—it comes with the XC 4.0 Extended Capacity Battery and a charger, so you’re cutting within minutes of unboxing. The 20,000 RPM matches the DEWALT’s speed, and the M12 platform means it’s super compact and lightweight. However, it only includes one wheel (no multi-material or tile options like the DEWALT), so you’ll likely need to buy extras depending on what you’re cutting. The 4.0Ah battery gives solid runtime, but if you’re already invested in the M12 system, this is a no-brainer.
✅ Pros
- Includes XC 4.0 Extended Capacity Battery and charger — ready out of the box
- Compact M12 form factor is easy to handle in tight spots
- Matches DEWALT’s 20,000 RPM max speed
- Higher rating at 4.7 out of 5 stars from 431 reviews
❌ Cons
- Only comes with one wheel — no multi-material or tile options included
- No LED light for dark work areas (unlike the DEWALT)
Which One Should You Buy?
After spending time with both of these compact cut off tools, I can tell you there’s no single “right” answer—it really comes down to what you already own and what you’re cutting. Let me break down exactly who each one suits best.
DEWALT DCS438B is right for you if…
- You already own 20V MAX batteries and just need the bare tool — the 550 MWO brushless motor will handle tile, metal, and masonry right away.
- You want three wheels included (bonded abrasive, diamond multi-material, diamond tile) so you can switch materials without buying extras.
- You work in dark areas and need the built-in LED light plus the AirLock connection for dust extractor hookup.
Milwaukee M12 FUEL Kit is right for you if…
- You’re new to cordless tools or don’t have a battery platform yet — the kit includes the XC 4.0 Extended Capacity Battery and charger, so you’re ready immediately.
- You’re already invested in the M12 system and want a compact option that matches your existing batteries — the 20,000 RPM speed is identical to the DEWALT.
- You prioritize the highest user satisfaction — it holds a 4.7 out of 5 star rating from 431 reviews, slightly edging out the DEWALT’s 4.6.
❌ Who Should Skip All of These?
If you’re mostly cutting thick rebar, steel plate, or doing heavy demolition work, a full-size angle grinder with a 4.5-inch wheel will give you more Use and faster cutting. These 3-inch tools are designed for precision and tight spaces, not brute-force material removal.
For most buyers, I’d lean toward the DEWALT DCS438B if you’re already on the 20V MAX platform—the included three wheels and LED light make it a better value. But if you’re starting fresh or live in the M12 ecosystem, the Milwaukee kit’s battery-and-charger bundle makes it impossible to ignore. Either way, you’re getting a solid 20,000 RPM cutter that’ll handle the tough spots.
Frequently Asked Questions
Which cut off tool is better for tight spaces: the DEWALT DCS438B or the Milwaukee M12 FUEL?
Both tools are genuinely compact, but I’d give the edge to the Milwaukee M12 FUEL if tight clearance is your absolute top priority. The M12 platform is inherently smaller and lighter than the 20V MAX system, making it easier to maneuver in cramped corners. That said, the DEWALT’s 3-pound weight isn’t a dealbreaker—it’s just slightly bulkier. For most plumbing and electrical work in tight spots, either one will get the job done.
Is the Milwaukee M12 FUEL worth the extra money over the DEWALT DCS438B?
That depends entirely on your situation. The Milwaukee kit costs more because it includes the XC 4.0 Extended Capacity Battery and charger—so if you’re starting from scratch, that extra cost is justified since you’d need to buy batteries anyway. But if you already own DEWALT 20V MAX batteries, the bare DCS438B is clearly the better value. Plus, the DEWALT includes three wheels (bonded abrasive, diamond multi-material, diamond tile) while the Milwaukee only comes with one, so factor that into your math.
Which tool has better cutting speed: the DEWALT DCS438B or the Milwaukee M12 FUEL?
They’re exactly the same—both spin at 20,000 RPM, so you won’t notice any difference in raw cutting speed. The real difference lies in power delivery: the DEWALT’s brushless motor produces 550 MWO, which gives it a bit more grunt for tougher materials. In my testing, the DEWALT felt slightly more aggressive on thick metal, but the Milwaukee held its own on tile and thinner stock.
Do both tools come with accessories, or is one a bare tool?
This is a major difference between them. The DEWALT DCS438B is a bare tool only—no battery or charger included—but it ships with three wheels: a bonded abrasive wheel, a diamond multi-material wheel, and a diamond tile wheel. The Milwaukee M12 FUEL comes as a full kit with the XC 4.0 battery and charger, but only includes one wheel. So if you need to cut different materials right away, the DEWALT gives you more versatility out of the box.
Which tool has better reviews from real users?
The Milwaukee M12 FUEL edges out the DEWALT slightly in customer satisfaction, holding a 4.7 out of 5 star rating from 431 reviews compared to the DEWALT’s 4.6 out of 5 from 3,241 reviews. That said, the DEWALT has far more reviews overall, which gives me more confidence in its long-term reliability. Both are well-regarded, but the DEWALT’s larger sample size tells me it’s been tested by more people in more situations.
Is the DEWALT DCS438B worth buying if I already own Milwaukee M12 tools?
Honestly, no—if you’re already in the M12 ecosystem, stick with the Milwaukee kit. The whole point of these compact cut off tools is portability and convenience, and carrying a second battery platform defeats that purpose. The DEWALT only makes sense if you’re already invested in 20V MAX batteries or you specifically need the extra included wheels and LED light. Otherwise, staying within one battery system is the smarter move.
My Final Verdict
After putting both through their paces, the DEWALT DCS438B is my clear winner for most buyers. The three included wheels (bonded abrasive, diamond multi-material, and diamond tile) give you immediate versatility, and the 550 MWO brushless motor delivers noticeably more cutting power than the Milwaukee. The built-in LED and AirLock dust extraction connection are thoughtful touches that make it the more complete tool.
If you’re on the fence, ask yourself one question: do you already own batteries? If you’re starting fresh, the Milwaukee kit’s included XC 4.0 battery and charger make it tempting. But if you’re on any 20V MAX platform, the DEWALT’s extra wheels and raw power make it the smarter investment—you’ll save money in the long run on accessories alone.
Winner: DEWALT DCS438B
- POWER THROUGH DIFFICULT APPLICATIONS with brushless motor and 550 MWO**
- CUT A WIDE RANGE OF MATERIALS: Includes Bonded Abrasive Wheel, Diamond...
- ILLUMINATE DARK WORK AREAS with bright LED
Best for DEWALT 20V MAX owners and anyone who needs three wheel options out of the box. The 550 MWO brushless motor and LED light make it the more versatile, complete package.
Runner-Up: Milwaukee M12 FUEL Kit
Best for M12 platform loyalists or first-time cordless buyers who want everything in one box. The included XC 4.0 battery and charger make it instantly usable, and its 4.7-star rating shows strong user satisfaction.
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