20V MAX* Angle Grinder Tool Cordless Brushless, 4 1/2 Inch,

Professional-grade cordless grinding with advanced electronic safety and brushless power.

Full manufacturer title

DEWALT 20V MAX* Angle Grinder Tool Cordless Brushless, 4 1/2 Inch, with Paddle Switch and Kickback Brake, Tool Only (DCG413B) One Size 20V 4.5IN Grinder

Member of The 90+ Clubscored 90+ out of 100

Typical price

$160

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DEWALT 20V MAX* Angle Grinder Tool Cordless Brushless, 4 1/2 Inch, with Paddle Switch and Kickback Brake, Tool Only (DCG413B) One Size 20V 4.5IN Grinder image 1

Ravvy verdict

93.8 / 100

Professionals should buy this for its top-tier safety sensors and brushless reliability, accepting the higher price point for a bare tool.

Best for: Professional contractors and metal fabricators on the DeWalt battery platform
Buy it if: You want rapid electronic brake stops wheels in under two seconds.
Skip it if: You are only need occasional light sanding.
Best alternative: DEWALT 20V MAX XR Cut Off Tool, Brushless and Compact, Bare Tool Only (DCS438B) (HVAC technicians, tilers, and DIY renovators)

How it scores on what matters

Safety Features98.0
Battery Versatility95.0
Motor Efficiency94.5
Ergonomics91.0
Cutting Power89.0

Ravvy factor scores, 0 to 100, derived from specs, owner reviews and category norms.

What it is

The DeWalt DCG413B represents a significant shift in cordless metalworking by prioritizing operator safety without sacrificing the torque needed for heavy-duty cutting. Its brushless motor provides efficient power delivery that mimics corded performance while extending runtime on the 20V MAX battery platform. The standout feature is the integrated Kickback Brake which instantly halts the wheel if the tool senses a bind-up, addressing one of the most common causes of workplace injury. Ergonomically, this grinder is balanced for one-handed operation during light tasks but includes a side handle for total control during heavy grinding. The paddle switch design includes a two-stage trigger to prevent accidental startups, while the E-Switch Protection ensures the tool won't jump to life if a battery is inserted while the trigger is depressed. It is a robust, well-engineered tool for tradespeople who need reliable performance in remote locations where power outlets are unavailable.

Ravvy AI insight

When selecting batteries for this grinder, avoid using compact 2.0Ah packs as they will overheat and throttle the motor under load. For the best balance of weight and sustained torque, pair this with at least a 5.0Ah XR or a Powerstack battery. The electronic brake is a premium feature that pays for itself by reducing disc fragmentation risks during stalls.

Generated from owner feedback, product specs, pricing, and retailer data. Last updated Aug 18, 2026.

What owners praise

Rapid electronic brake stops wheels in under two seconds
Brushless motor reduces maintenance and improves efficiency
Kickback Brake prevents violent tool jerks during stalls
Two-stage paddle switch enhances operator safety
Excellent power-to-weight ratio for a cordless unit
Compatible with the extensive DeWalt 20V battery ecosystem

What to know first

Sold as a bare tool without battery or charger
High current draw depletes small batteries very quickly
Higher initial investment compared to brushed models

Specifications

UPC: 885911510844
GTIN: 885911510844
Brand: DEWALT
Color: Multi
Style: 20V 4.5IN Grinder
Voltage: 20 volts
Wattage: 20 watts
Material: Metal, Plastic
Brand Name: DEWALT
Horsepower: 0.16 hp
Style Name: 20V 4.5IN Grinder
Unit Count: 1 Count
Item Weight: 16 ounces
Manufacturer: DEWALT
Model Number: DCG413B
Power Source: Battery Powered
Material Type: Metal, Plastic
Item Type Name: DEWALT DCG413B 20V XR Brushless 4.5-inch Angle Grinder, Baretool
Number of Items: 1
Product Dimensions: 12.2"L x 4.7"W x 6"H
Included Components: 1) Angle Grinder
Manufacturer Part Number: DCG413B
Maximum Rotational Speed: 3450 rpm
Item Dimensions L x W x H: 12.2"L x 4.7"W x 6"H
Manufacturer Warranty Description: 3 year limited warranty
Global Trade Identification Number: 00885911510844
Compatible Disc Grinder Tool Models: DEWALT DCG413B

How to get the most out of it

Adjusting the Guard

Use the one-touch guard adjustment to shield yourself from sparks depending on your cutting angle. Simply depress the release lever to rotate the guard into the most protective position for your specific task.

Ownership tips

tip

Battery Optimization

For heavy grinding or thick metal cutting, use DeWalt FlexVolt or high-capacity XR batteries. These high-output cells provide the necessary current to prevent the tool from bogging down during demanding applications.

care

Airflow Maintenance

Metal dust is conductive and can damage internal electronics over time. Regularly use compressed air to blow out the motor vents to prevent debris buildup and ensure the brushless motor stays cool.

Frequently asked questions

Does this grinder come with a battery?

No, the DCG413B is a bare tool, meaning it does not include a battery or charger. This is ideal for users who already own other DeWalt 20V MAX tools and have compatible batteries.

What is the difference between a paddle switch and a slide switch?

A paddle switch requires constant pressure to run, which is a safety feature that ensures the tool stops if you drop it. A slide switch can be locked in the on position, which is preferred by some for long, continuous grinding sessions.

Can I use 5-inch discs on this 4.5-inch grinder?

You should only use 4.5-inch discs as specified. Using larger discs requires removing the safety guard, which is dangerous and significantly increases the risk of injury if the disc shatters.

How fast does the wheel stop after releasing the trigger?

The integrated electronic brake is designed to bring the wheel to a complete stop in two seconds or less. This feature greatly improves safety compared to older models that might coast for several seconds.

Where can you buy the 20V MAX* Angle Grinder Tool Cordless Brushless, 4 1/2 Inch,?

20V MAX* Angle Grinder Tool Cordless Brushless, 4 1/2 Inch, is sold through Amazon, and DEWALT also lists it through its own site and major retail partners. The buy link on this page goes straight to the current Amazon listing, which is where stock and pricing update most often.

How much does the 20V MAX* Angle Grinder Tool Cordless Brushless, 4 1/2 Inch, cost?

The last price Ravvy recorded was $160. Retail pricing on power tools moves with promotions and stock, so treat that figure as a reference point and check the live listing before you buy.

How do you get the 20V MAX* Angle Grinder Tool Cordless Brushless, 4 1/2 Inch, for a cheaper price?

Three tactics work best: watch for holiday and seasonal sale events when power tools discounts run deepest, compare the open box or renewed listing against new stock, and check whether DEWALT is running a coupon or bundle. Adding the product to your Ravvy wishlist keeps it handy so you can revisit the listing when prices drop.

Is the 20V MAX* Angle Grinder Tool Cordless Brushless, 4 1/2 Inch, in stock right now?

It was in stock at our last check. Availability on popular power tools can change within hours, so the live listing is the source of truth.

Is the 20V MAX* Angle Grinder Tool Cordless Brushless, 4 1/2 Inch, worth it?

Ravvy scores it 93.8 out of 100. The strongest argument for it is rapid electronic brake stops wheels in under two seconds. The trade off to weigh is sold as a bare tool without battery or charger.

Who should buy the 20V MAX* Angle Grinder Tool Cordless Brushless, 4 1/2 Inch,?

It fits professional contractors and metal fabricators on the DeWalt battery platform If that does not describe your situation, compare it with the other options in Power Tools before committing.

What are the key specs of the 20V MAX* Angle Grinder Tool Cordless Brushless, 4 1/2 Inch,?

UPC: 885911510844. ASIN: B07457BXJW. GTIN: 885911510844. Brand: DEWALT.

What are good alternatives to the 20V MAX* Angle Grinder Tool Cordless Brushless, 4 1/2 Inch,?

Compare it against the other scored picks in Power Tools on Ravvy. We rank every option in that group by the same criteria, so you can see which model wins on value, quality, and owner sentiment before you decide.

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