10 Best DeWalt 20V Angle Grinders: Picks by MWO

The Short Version

If you compare these tools by the numbers, one figure separates them: motor output in MWO. The DCG410B and DCG411VS list 1,590 and 1,640 MWO. The DCG408B and DCG407B list 850 MWO. The rest of the list doesn’t print a power figure at all. For most people shopping for the best DeWalt 20V angle grinder, the DCG413B leads because it pairs a brushless motor with a brake that stops the wheel in 2 seconds or less and a kickback brake that shuts the tool down on a bind-up.

Head to Head on What Matters

Motor Output and Wheel Size

Only four listings in this group print a motor output figure, so that’s the honest starting point. The DCG411VS lists 1,640 MWO and the DCG410B lists 1,590 MWO. The DCG408B and DCG407B both list 850 MWO. The DCG413B, DCG416B, DCG405B, DCG413FB and Atomic don’t state MWO at all, which means the number is unknown for them, not low.

Wheel size splits the group differently. The DCG413B, DCG405B, DCG408B, DCG407B and Atomic are all 4-1/2 inch tools. The DCG416B, DCG410B and DCG411VS take 4-1/2 inch to 5 inch wheels, and the DCG413FB is a 5-inch flathead.

RPM is the one figure most of them share. The DCG408B, DCG407B, DCG410B and DCG411VS all list 9,000 RPM no load. The DCG412P2 kit lists 8,000 RPM. The DCG413B, DCG416B, DCG405B and DCG413FB don’t print an RPM figure, so treat it as unstated.

Braking and Anti-Kickback Electronics

This is where the listings actually get specific, and it’s the axis buyers under-weight. The DCG413B, DCG405B and DCG413FB all say the brake stops the wheel in 2 seconds or less on average. The Atomic goes further and lists its electronic brake stopping the wheel within 1.25 seconds after the trigger is released.

Kickback Brake shows up on the DCG413B, DCG416B, DCG405B, DCG408B and DCG407B. It engages with maximum force when the tool senses a pinch, stall or bind-up, then shuts the grinder off. The DCG416B adds E-CLUTCH, which shuts the motor down in under a tenth of a second when a pinch or stall is detected.

The DCG410B and DCG411VS use a different name for a similar idea: an anti-rotation system that senses excessive rotational motion and shuts the tool down. The DCG412P2 kit doesn’t list any of these systems, and the Atomic lists the anti-rotation system but not a kickback brake by name.

Switch Type and What Comes in the Box

Switch type is the axis that decides whether you enjoy using the tool. The DCG413B, DCG416B, DCG408B, DCG411VS, DCG413FB and Atomic all use a paddle switch. The DCG405B, DCG407B and DCG412P2 use a slide switch.

The DCG413B and DCG413FB go one step further with a two-stage trigger that requires two actions to activate the tool. Both also list E-Switch Protection or Power-Loss Reset, so after a power cut the trigger has to be cycled off and on before the tool restarts.

What’s in the box separates the DCG412P2 kit from everything else. It ships with two 5.0 amp hour batteries, while every other tool here is listed as tool only or bare tool. The DCG405B is the only tool-only listing that names its included accessories: a side handle, hex key, inner and outer flange, and a 4.5 inch type 27 guard. The DCG416B and DCG410B are both Tool Connect chip ready, with the chip sold separately.

What the Numbers Mean for You

A jump from 850 MWO to 1,590 MWO isn’t a marketing detail. It’s the difference between a grinder that slows down in a long cut and one that holds its speed while you lean on it.

Braking time works the same way. A wheel that stops in 1.25 seconds versus 2 seconds sounds small on paper. In your hand, it’s the gap between setting the tool down and waiting, and setting it down and moving on.

Where a bigger number stops helping: RPM. Every listing that prints it says 9,000 RPM no load, so there’s no advantage to chase there. Wheel size is the same story — 5 inches gives you reach, but a 4-1/2 inch wheel does most jobs and takes up less space. And an unstated figure, like MWO on the DCG413B, isn’t a weakness. It’s just a number the seller didn’t print.

1. 20V MAX* Angle Grinder Tool Cordless Brushless

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Best for: Most buyers who want one grinder that does it all

This is the tool that balances the three axes without a weak spot. It’s a 4-1/2 inch grinder with a brushless motor, a brake that stops the wheel in 2 seconds or less on average, and a Kickback Brake that engages with maximum force on a pinch, stall or bind-up. The two-stage trigger requires two actions to start the tool, which is a deliberate design choice for control. E-Switch Protection means that after a power outage, the trigger has to be cycled off and then on before the grinder restarts.

The trade-off is that DeWalt doesn’t publish the kind of performance specs you could compare against other models. So you can’t line it up against the DCG410B or DCG411VS on raw power, and if hard performance data matters to you, this isn’t the listing that answers it. What you do get is a complete safety package in a 4-1/2 inch body.

This isn’t the grinder for someone who needs a larger wheel for deep cuts, and it’s not for a buyer who wants batteries in the box. It’s tool only, so you’re supplying the 20V MAX battery and charger you already own.

Pros

• Brake stops the wheel in 2 seconds or less on average
• Kickback Brake shuts the tool off on a pinch, stall or bind-up
• Two-stage trigger needs two actions to activate
• Brushless motor needs no brush changes

Cons

• Tool only, so no battery or charger included
• Motor output and RPM aren’t stated in the listing
• 4-1/2 inch wheel only, no 5-inch option

2. FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder

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Best for: Buyers who want one grinder to cover two wheel sizes

The headline claim is up to 54% more power when paired with FLEXVOLT batteries, and that’s the one figure that sets this tool apart from the rest of the group. It runs on all DeWalt 20V MAX and FLEXVOLT batteries, so it works with what you already own and gains output when you step up. The wheel range is 4-1/2 inch to 5 inch, which covers both common sizes.

On safety, it carries Kickback Brake and E-CLUTCH, which shuts the motor down in under a tenth of a second when a pinch or stall is detected. That E-CLUTCH figure is a different mechanism from the brake that stops the wheel after you release the trigger.

The trade-off is that the power gain depends on a battery type, not the tool alone. If you only own standard 20V MAX packs, you’re not getting the 54% figure. It’s also Tool Connect chip ready, with the chip sold separately.

This isn’t for a buyer who wants the simplest possible tool. Between the battery-dependent power claim and the chip-ready feature, there’s more to think about here than with the DCG413B.

Pros

• Up to 54% more power with FLEXVOLT batteries
• Takes 4-1/2 inch and 5 inch wheels
• E-CLUTCH shuts the motor down in under a tenth of a second
• Works with all DeWalt 20V MAX and FLEXVOLT batteries

Cons

• The power gain depends on which battery you use
• Tool Connect chip is sold separately
• Tool only, so no battery in the box

3. 20V MAX* XR Angle Grinder with Kickback Brake

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Best for: Buyers who prefer a slide switch that stays put

The DCG405B is the slide-switch answer to the DCG413B, and it carries the same core safety package. The brake stops the wheel in 2 seconds or less on average, and Kickback Brake engages with maximum force on a pinch, stall or bind-up. Power Loss Reset prevents accidental restarts after a power disruption when the tool is left in the on position, which is a real concern with a switch that holds its place.

It’s also the only tool-only listing here that spells out exactly what’s in the box: the grinder, a side handle, a hex key, inner and outer flange, and a 4.5 inch type 27 guard. That’s a complete setup minus the battery, and it means you’re not hunting for a flange before your first cut.

The trade-off is the switch itself. A slide switch stays where you set it, and the listing notes it can be less safe than a paddle that needs a grip to run. This is a 4-1/2 inch tool with no 5-inch option, and the listing doesn’t print a motor output figure.

This isn’t for someone who wants a two-stage trigger or a paddle switch. If your habit is to keep a hand wrapped around the tool at all times, the DCG413B suits you better.

Pros

• Brake stops the wheel in 2 seconds or less on average
• Power Loss Reset prevents accidental restarts
• Kickback Brake engages on a bind-up
• Listing names all included accessories

Cons

• Slide switch stays in position rather than needing a grip
• 4-1/2 inch wheel only
• Motor output isn’t stated in the listing

4. 20V MAX Cordless 4 1/2 Inch Paddle-Switch Grinder

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Best for: Buyers who want light weight and simple operation

This tool prints 3.55 lbs bare tool. DeWalt pairs that with a run time claim of up to 56 cuts of 1/2 inch rebar, which is the most concrete runtime figure anywhere in this group. The brushless motor is listed at up to 850 MWO and up to 9,000 RPM no load.

The safety package is the Perform & Protect anti-rotation setup, which includes a Kickback Brake and E-Clutch. So you get the bind-up protection and the fast motor shutdown, in a body that’s easier to hold for long stretches.

The trade-off is that 850 MWO figure. If your work is cutting rebar and light clean-up, that’s fine. If you’re removing weld for hours, the higher-output tools in this list are built for it.

This isn’t for a buyer who needs a bigger wheel or maximum motor output. It’s also tool only, so the battery and charger are on you.

Pros

• 3.55 lbs bare tool
• Up to 56 cuts of 1/2 inch rebar per charge
• Kickback Brake and E-Clutch anti-rotation features
• 9,000 RPM no load

Cons

• 850 MWO is the lowest motor output printed in this group
• Tool only, no battery or charger
• 4-1/2 inch wheel only

5. 20V MAX* XR Brushless Cordless 4-1/2-5 in. Angle Grinder

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Best for: Heavy grinding and cutting where output matters most

The DCG410B lists up to 1,590 MWO and up to 9,000 RPM no load, and DeWalt calls it part of its most powerful line of 20V MAX angle grinders. It takes 4-1/2 inch to 5 inch wheels, so you get the reach of a 5-inch disc when you need it. The anti-rotation system senses excessive rotational motion and shuts the tool down.

It also carries two features the simpler tools don’t. It’s Tool Connect chip ready, so with the chip you can track and manage it through the Tool Connect Site Manager app. And it has a wireless tool control system with on/off capability when paired with a compatible DeWalt dust extractor, which is a genuine workflow advantage if you’re already running one.

The trade-off is that both of those features depend on something you buy separately. The chip is sold separately, and so is the dust extractor. On its own, the tool’s advantage over the DCG408B is the motor output and the wheel range.

This isn’t for a buyer who wants a compact 4-1/2 inch-only tool or who won’t use the connected features. It’s tool only, and the listing doesn’t name included accessories.

Pros

• Up to 1,590 MWO and 9,000 RPM no load
• Takes 4-1/2 inch and 5 inch wheels
• Anti-rotation system shuts the tool down on excessive motion
• Wireless on/off with a compatible DeWalt dust extractor

Cons

• Tool Connect chip sold separately
• Dust extractor for the wireless feature sold separately
• Tool only, and included accessories aren’t listed

6. 20V MAX XR Brushless Cordless Angle Grinder

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Best for: Work that needs matched wheel speed for the material

Variable speed is the whole point here. You can adjust wheel speed to suit the material instead of running everything at full tilt. The motor is listed at up to 1,640 MWO and 9,000 RPM, which is the highest motor output figure printed in this group. It takes 4-1/2 inch to 5 inch wheels and weighs 4.85 lbs bare tool.

The anti-rotation system is there to help maximize control, and it’s Tool Connect chip ready with the chip sold separately. It’s compatible with all DeWalt 20V MAX batteries, so it slots into a battery platform you may already own.

The trade-off is weight. At 4.85 lbs bare tool, that’s before a battery goes on. If you’re working overhead or in tight spots for long stretches, that weight shows up in your arms.

This isn’t for a buyer who wants the lightest tool or who never changes speed. If you cut and finish the same material all day, variable speed is a feature you’d pay for and not use.

Pros

• Variable speed lets you match wheel speed to the material
• Up to 1,640 MWO, the highest output printed here
• Takes 4-1/2 inch and 5 inch wheels
• Works with all DeWalt 20V MAX batteries

Cons

• 4.85 lbs bare tool
• Tool Connect chip sold separately
• Tool only, no battery or charger

7. 20V MAX* Angle Grinder Tool Kit

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Best for: Buyers who need everything in one box

This is the only kit in the group, and that changes the whole calculation. It ships with two 5.0 amp hour batteries, so you can start working the day it arrives. The motor is listed at 8,000 RPM, which is the only RPM figure here that isn’t 9,000, and it’s a 4-1/2 inch tool.

The convenience features are aimed at fast changes. Quick-Change Wheel Release lets you remove the wheel without a wrench, and the tool-free guard adjusts and repositions without tools. The two-finger trigger has a lock-off button, and the two-position side handle gives you a choice of grip.

The trade-off is the safety electronics. This listing doesn’t name a Kickback Brake, E-Clutch or anti-rotation system, and it doesn’t print a motor output figure. If bind-up protection is your priority, the DCG413B or DCG416B is the better fit. It’s also the only tool here with a slide-style trigger and lock-off rather than a paddle.

This isn’t for a buyer who already owns 20V MAX batteries and wants the newest safety package. It’s for someone starting from nothing or adding a second battery set.

Pros

• Ships with two 5.0 amp hour batteries
• Quick-Change Wheel Release needs no wrench
• Tool-free guard adjusts without tools
• Two-position side handle for control and comfort

Cons

• No Kickback Brake or anti-rotation system named in the listing
• 8,000 RPM, the only figure here below 9,000
• Motor output isn’t stated

8. 20V MAX* XR Angle Grinder with Brake

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Best for: Grinding in tight angles where a standard head won’t reach

The flathead design is the reason to pick this one. It’s a 5-inch grinder with a paddle switch, so it reaches into spots a standard 4-1/2 inch body can’t. It carries the same brake as the DCG413B, stopping the wheel in 2 seconds or less on average, and a brushless motor that needs no brush changes.

Power Loss Reset is here too. After a power outage or unexpected shutdown, the trigger has to be cycled off and then on before the tool restarts. The two-stage trigger requires two actions to activate, which keeps the start deliberate.

The trade-off is that this is a specialist tool. The 5-inch wheel and flathead profile are built for access, not for general-purpose cutting, and the listing doesn’t print a motor output or RPM figure. If you mostly cut rebar and grind flat plate, a standard body like the DCG413B is easier to handle.

This isn’t for a buyer who wants one grinder for everything. It’s a second tool for the jobs the first one can’t reach.

Pros

• 5-inch flathead design reaches tight angles
• Brake stops the wheel in 2 seconds or less on average
• Power Loss Reset prevents restarts after a power cut
• Two-stage trigger needs two actions to activate

Cons

• Specialist flathead body, not a general-purpose shape
• Motor output and RPM aren’t stated
• Tool only, no battery or charger

9. 20V MAX Cordless 4 1/2 Inch Slide-Switch Power Angle Grinder

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Best for: Tight spaces and buyers who want a slide switch

This is the slide-switch twin of the DCG408B, and the listed figures match it: 3.55 lbs bare tool, up to 56 cuts of 1/2 inch rebar, up to 850 MWO and up to 9,000 RPM no load. It carries the same Perform & Protect anti-rotation features, with a Kickback Brake and E-Clutch.

So the real difference between the two is the switch. This one slides and holds its position, and the listing notes it can be less safe than a paddle that needs a grip to run. The light 3.55 lb body helps there too, and it’s a 4-1/2 inch tool.

The trade-off is the same as its paddle twin: 850 MWO is the lowest motor output printed in this group. It’s a light-duty and medium-duty tool, not a heavy grinding machine.

This isn’t for a buyer who wants a paddle switch or maximum output. If you want the paddle version of this exact tool, the DCG408B is it.

Pros

• 3.55 lbs bare tool
• Up to 56 cuts of 1/2 inch rebar per charge
• Kickback Brake and E-Clutch anti-rotation features
• Slide switch holds its position

Cons

• 850 MWO is the lowest motor output printed in this group
• 4-1/2 inch wheel only
• Tool only, no battery or charger

10. 20V MAX* ATOMIC 4-1/2-in. Angle Grinder (Tool Only)

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Best for: Reaching ultra tight spaces with a slim body

The Atomic is built around access. The listing describes a slim, ergonomic design with a smaller gripping diameter for getting into ultra tight spaces, and it’s a 4-1/2 inch tool. The electronic brake is listed as stopping the wheel within 1.25 seconds after the trigger is released, which is the fastest brake figure in this group.

The anti-rotation system quickly stops the wheel when a pinch, stall or bind-up is sensed, reducing reactionary torque, and the switch needs to be cycled to restart the tool. Guard changes are quick too: a clip-on guard converts the standard Type B guard into a Type A guard. Wheel changes use a spindle lock, so you don’t need multiple wrenches.

The trade-off is that the slim body is the priority here, and the listing doesn’t print a motor output figure or an RPM figure. So you can’t compare its power against the DCG410B or DCG411VS on paper.

This isn’t for a buyer who needs a 5-inch wheel or the highest printed motor output. It’s for the jobs where a standard body simply won’t fit.

Pros

• Electronic brake stops the wheel within 1.25 seconds
• Slim body with a smaller gripping diameter for tight spaces
• Clip-on guard converts Type B to Type A
• Spindle lock makes wheel changes easier

Cons

• Motor output and RPM aren’t stated
• 4-1/2 inch wheel only, no 5-inch option
• Tool only, no battery or charger

Also Worth Considering

The 20V MAX XR Brushless Cordless kit (DCG410WW1) bundles the DCG410B grinder with an XR POWERPACK, so it’s the way to get that tool’s anti-rotation system and connected features without buying a battery separately. If you want the DCG411VS variable-speed motor but prefer a slide switch over a paddle, the 20V MAX XR Brushless Cordless (DCG411VSB) is the same tool with the other switch type. And the DCG405BR Cordless Small Angle Grinder is a renewed version of the DCG405B slide-switch grinder with the Kickback Brake, which suits a buyer who is comfortable with renewed tools.

Frequently Asked Questions

Is a higher MWO number always better?

Yes. A higher MWO means more motor output, which helps in long cuts and heavy grinding where the tool would otherwise slow down. The DCG411VS lists 1,640 MWO at 4.85 lbs bare tool, and the DCG408B lists 850 MWO at 3.55 lbs. Match the figure to the job.

What does it mean when a listing doesn’t state a spec?

It means the seller didn’t print it. It doesn’t mean the figure is zero, or that the tool is worse than one that does print it. Several grinders here don’t state MWO or RPM, including the DCG413B and the Atomic. You can still compare them on what the listing does give you: brake time, switch type, wheel size, weight and safety systems.

How do I compare a brake time against an E-CLUTCH claim?

They measure different things, so don’t rank them against each other. A brake time, like the 2 seconds or less on the DCG413B or the 1.25 seconds on the Atomic, is how long the wheel takes to stop after you release the trigger. E-CLUTCH on the DCG416B shuts the motor down in under a tenth of a second when a pinch or stall is detected.

Can I use a 5-inch wheel on a 4-1/2 inch grinder?

No. Wheel size is set by the tool and its guard. The DCG413B, DCG405B, DCG408B, DCG407B and Atomic are 4-1/2 inch tools. The DCG416B, DCG410B and DCG411VS take 4-1/2 inch to 5 inch wheels, and the DCG413FB is a 5-inch tool. Always fit a wheel the listing and the guard support.

Closing

If you weigh the three axes together, the DCG413B wins on the one that matters most: it pairs a 2-second brake with a Kickback Brake and a two-stage trigger in a 4-1/2 inch body, and it doesn’t depend on a battery upgrade to deliver any of it. If you’re not sure which axis you care about, the DCG412P2 kit is the safer choice, because it arrives with two 5.0 amp hour batteries and you can work immediately. Next step: check today’s price on the one that fits your work, then confirm your battery platform matches.