
DEWALT DCG408BDEWALT 20V MAX 4-1/2" Brushless Grinder
Light at 3.55 lb, with a listed kickback brake and a brushless motor.
- Motor power
- —
- Weight
- 3.55 lb
- Kickback brake
- Yes
Picking a cordless angle grinder comes down to a few specs. Weight decides how long you can hold it overhead. Disc diameter sets which wheels you can buy. A kickback brake limits the damage if the disc binds. A brushless motor and a listed warranty come after those. We put 10 products on one spec sheet so you can compare them line by line. Many makers leave some specs blank, and we say so when that happens. Battery and charger are often not included, so check the kit before you choose.
Quick answer
Ranked from 10 angle grinders that met our standard, compared on weight, disc diameter, kickback brake.
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Light at 3.55 lb, with a listed kickback brake and a brushless motor.

Lists a kickback brake and an adjustable side handle, at 4.99 lb.

Highest no-load speed listed at 19500 rpm, but its disc is only 3 in.
| Spec | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Best Scoreout of 100 | 78 | 71 | 62 | 57 | 56 | 50 | 50 | 47 | 47 | 34 |
| Motor powerA | — | — | — | — | — | — | — | — | — | — |
| No-load speedrpm | 9000 rpm | — | 19500 rpm (best in row) | 8500 rpm | 9000 rpm | 10000 rpm | — | 9500 rpm | 12000 rpm | 9600 rpm |
| Disc diameterin | 4.5 in | 4.5 in | 3.0 in | 5.0 in | 4.5 in | 4.5 in | 4.5 in | 4.5 in | 4.5 in | — |
| Weightlb | 3.55 lb | 4.99 lb | — | 5.60 lb | 4.59 lb | 3.97 lb | 3.30 lb (best in row) | 10.63 lb | — | 10.27 lb |
| Power source | Cordless brushless | Cordless brushless | Cordless brushless | Cordless brushless | Cordless brushless | Cordless brushless | Cordless brushless | Cordless brushless | Cordless brushless | Cordless brushless |
| Brushless motor | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Kickback brake | Yes | Yes | — | — | — | — | — | — | — | — |
| Tool-free guard adjustment | — | — | — | — | — | — | — | — | — | — |
| Spindle lock | — | — | Yes | — | — | — | Yes | Yes | Yes | — |
| Adjustable side handle | — | Yes | — | — | — | Yes | Yes | — | Yes | Yes |
| Warrantyyr | — | — | — | — | — | — | — | — | — | — |
| Included accessories | Tool only (no battery or charger) | Tool only (no battery or charger) | 2x batteries, charger, 6 discs, hard case | Tool only; battery and charger not included | Tool only, no battery or charger | 2 batteries, charger, side handle, wheels, bag | 2 batteries, charger, 2 guards, wheels, case | 2 batteries, charger, handle, 2 guards, wheels | 2 batteries, charger, handle, guard, wheels, case | 2 batteries, charger, guard, handle, case |
We reviewed 34 angle grinders and kept only the 10 that pass every check below. Those are ranked by a Best Score built from spec fit for this job, sales rank.
These reviews draw only on specifications and listing information for the five top-ranked grinders.
Light, brushless and brake-equipped for overhead work
Weight matters most for overhead and long sessions, and the DCG408B weighs 3.55 lb as a bare tool. Among the models that list weight, only the DEKOPRO is lighter. Less weight on your arms means less fatigue over a shift. It also lists a kickback brake, a feature that only this grinder and the Milwaukee carry in our data. It ranks first on our spec sheet.
The motor is brushless, with a no-load speed of 9000 rpm. The disc is 4.5 in, a common size, so replacement wheels are easy to find. The listing also names an E-Clutch alongside the brake, which adds another layer against kickback. Our data does not list a spindle lock, side handle or warranty, so check those before you buy.
This is a bare tool. The listing says no battery or charger is included, so you must buy them separately. The listing cites rebar cuts as its run time example, which gives a rough sense of capacity. It does not give a full run time for a given battery, so treat that claim as a guide only.
VerdictThe DCG408B is the strongest match for this keyword if you can supply your own battery.
Brake and side handle, but heavier to hold up
The Milwaukee 2880-20 lists a kickback brake, a side handle and a brushless motor. That covers the safety and control items buyers ask about. The weak point is weight. At 4.99 lb, it is heavier than the DEWALT DCG408B and will tire your arms sooner during overhead work. It ranks second on our spec sheet.
The disc spec is 4.5 in, and the product name says it also takes 5 in discs. The listing calls the spindle compatible with common grinding accessories. No-load speed is not listed in our data, so you cannot compare its speed with the others. It does list an electronic clutch for kickback protection and overload protection for motor life.
It is sold as a bare tool, with no battery or charger. The listing says it works with all M18 batteries, so it suits someone already on that system. The side handle is described as anti-vibration, which helps control during longer jobs. No warranty length is listed in our data. Check the rest of the accessory list before you order.
VerdictThe Milwaukee is a safe, controlled pick for M18 owners who can accept the extra weight.
A compact 3 in cutter, not a full-size grinder
The TEENO T-3608-WS does not really fit this keyword. Its disc is 3 in, the smallest in the lineup, while 4.5 in is the common size for this kind of tool. It suits tight spaces and light cut-off work. It ranks third on our spec sheet, helped by its kit and its brushless motor.
Its no-load speed is 19500 rpm, the highest in the lineup. Small discs usually run faster, so that figure fits the size. The motor is brushless and the listing gives 500W. A spindle lock is listed, which makes disc changes quicker. A kickback brake is not listed, and the weight is not published, so overhead fatigue is unknown.
This is the only kit in the top five that ships ready to run. It includes 2 batteries, a charger, 6 discs and a hard case. The listing also describes an adjustable base guard and a cutting guard. It is a better fit for pipe, bolts and tile detail than for heavy grinding.
VerdictChoose it as a compact second tool, not as your main cordless grinder.
Takes the biggest disc, at a heavier weight
The Makita XAG04Z has the largest disc in the lineup at 5 in. A bigger disc covers more surface per pass. That makes it better for flat surface work than for tight spots. The cost is weight. At 5.6 lb, it is heavier than most grinders that list weight, and it will be harder to hold overhead. It ranks fourth on our spec sheet.
No-load speed is 8500 rpm, the lowest in the lineup. A lower speed is not a flaw by itself, since the listing says Automatic Speed Change adjusts speed and torque during use. The listing also describes Active Feedback-sensing Technology, which turns the motor off if the wheel is suddenly forced to stop. That guards against binding, but it is not a listed kickback brake.
It is sold as a tool only. The listing says battery and charger are not included. Our data does not list a spindle lock, side handle or warranty, so confirm those details. It is a reasonable choice for 18V LXT owners who want a larger disc.
VerdictThe XAG04Z suits owners who value a larger disc over low weight.
Pro-oriented DEWALT with more weight and no brake listed
The DEWALT DCG410B shares the 9000 rpm no-load speed and 4.5 in disc of the DCG408B. It weighs 4.59 lb, which is more than the 3.55 lb of its sibling. For overhead work, that gap adds up. It ranks fifth on our spec sheet, behind both the DCG408B and the Milwaukee.
The listing points to a brushless motor with up to 1,590 MWO, which the maker presents as part of its most powerful 20V Max grinder line. It also describes an anti-rotation system that shuts the tool down if motion is excessive. That is useful protection, but our data does not list a kickback brake, spindle lock or side handle for this model.
This model leans toward jobsite management. It is TOOL CONNECT Chip ready, though the chip is sold separately, and it can pair with a compatible DEWALT dust extractor for wireless on and off control, also sold separately. Those extras matter to crews tracking tools. They do little for a buyer who simply wants a light grinder. It is sold without a battery or charger.
VerdictChoose the DCG410B for fleet tracking features, not for low weight.
Best among the reviewed tools
Weight is the first spec to check for overhead or long jobs. In this lineup, listed weights run from 3.3 lb to 10.63 lb. Check whether the figure is for the bare tool, as DEWALT states for the DCG408B. A battery adds more weight to the tool in your hands.
A 4.5 in disc is the most common size in this lineup, and it keeps wheel choices wide. A 3 in model like the TEENO suits tight spots but not heavy grinding. A 5 in disc covers more surface per pass, at the cost of weight. Match the size to your wheels.
A kickback brake or electronic clutch limits what happens when a disc binds. In our data, only the DEWALT DCG408B and the Milwaukee 2880-20 list a kickback brake. Others describe related features, such as the Makita's feedback sensing and the DEWALT DCG410B's anti-rotation system. Read each listing closely and wear a guard.
A brushless motor has no carbon brushes to replace and usually runs cooler. All ten grinders here list one, so it does not separate them. Warranty length is not listed for any product in our data, so ask the seller. Also confirm whether the battery and charger come in the box.
Among the models that list weight, the DEKOPRO Cordless Angle Grinder 20V is lightest at 3.3 lb. The DEWALT DCG408B follows at 3.55 lb and also lists a kickback brake, which the DEKOPRO does not in our data.
A 4.5 in disc suits most general work and has the widest choice of wheels. Pick 5 in for more coverage per pass, or a 3 in model for tight spaces and light cutting. Check that the spindle thread and arbor match your discs.
Not always. The DEWALT DCG408B, Milwaukee 2880-20, Makita XAG04Z and DEWALT DCG410B are sold as tool only. The TEENO and several others ship with batteries and a charger. Read the included accessories line before you compare.
A brushless motor has no carbon brushes to wear out, runs cooler and uses battery energy more efficiently, according to maker listings. Every grinder on this page lists one, so use weight, disc size and safety features to decide.
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