DEWALT DCG412B 20V MAX Angle Grinder 4.5 Inch
- 4-1/2 inch wheel, cordless 20V MAX
- Brushless, 850 MWO, up to 9,000 RPM no load
- Kickback Brake and E-Clutch anti-rotation features
- 3.55 lb bare tool weight
- Up to 56 cuts of 1/2 inch rebar, run time claim
- Bare tool, no battery or charger
Last refreshed Jun 24, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A compact brushless grinder for owners already on the DEWALT battery platform, with kickback and clutch protection built in. The listing mixes details from two models, so check the switch type and wheel size before buying.
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ASIN: B007NVSS1WModel: DCG412BCategory: Angle Grinders
Overview
A brushless motor drives the wheel, while an electronic clutch and kickback brake react when the wheel binds. The grinder runs on DEWALT battery packs, ships as a bare tool, and comes with a side handle and clip on guard.
Protection against binding is the reason to choose it: the brake and clutch react when the wheel catches, which matters on rebar cuts. Low weight helps on overhead work and long sessions. The listing blends this model with an older trigger switch version, so confirm what ships.
Who it's for
Jobsites where cords get in the way, and crews already carrying DEWALT packs, get the most from a bare grinder. Buyers starting from zero will need to add a battery and charger, and those cutting thick stock may want a larger wheel class.
Pros and cons
- Kickback brake reacts to binding
- E-Clutch limits rotation on stalls
- Light for overhead work
- Cordless, no extension cords
- Battery and charger sold separately
- Listing mixes details from two models
- Switch type unclear, slide or trigger
- Warranty term not listed
Performance notes
Cutting speed depends on motor output and battery state, since a brushless motor holds speed under load only while the pack can supply current. Wheel binding is the main hazard, which the brake and electronic clutch address by stopping rotation fast. Larger packs extend run time but add weight.
Where it stands among angle grinders
- #3 most-searched brand and model of the 27 angle grinders lines we track (by search demand, not sales).
From the specs of the 10 angle grinders we list; not a test result.
Specifications
| Brand | Dewalt |
|---|---|
| Model | DCG412B |
Frequently asked questions
Does the DEWALT DCG407B take 5 inch wheels?
Title and specs describe a 4-1/2 inch grinder. Only the description mentions a 4-1/2 inch / 5 inch tool, and it names the DCG412B, so do not assume 5 inch wheels fit.
Does the DEWALT DCG407B have a slide switch or a trigger?
The title says slide switch, while the description describes a trigger switch with a lock-off button from the DCG412B. Check the box label or ask the seller.
What comes in the box with the DEWALT DCG407B?
Specs list the grinder, a side handle, a clip-on guard, inner and outer flanges and a hex wrench.
Which batteries work with the DEWALT DCG407B?
It is listed as a 20V MAX tool. The listing does not name specific packs.