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DEWALT 20V MAX Cordless 4 1/2 Inch Paddle-Switch Grinder, Bare Tool Only (DCG408B)

TLDR Review: DEWALT DCG408B Grinder

Item: DEWALT DCG408B Grinder
Author: ShopSavvy

By ShopSavvy Team

Published: February 7th, 2026

Pros

•Very easy to use and highly effective for various grinding and cutting tasks.
•Powerful enough to handle a wide range of materials, offering more power than expected for a cordless grinder.
•Delivers consistent, reliable performance comparable to many corded angle grinders.
•Lightweight design makes it easy to handle and operate for both beginners and experienced users.
•Batterowered, providing versatility and freedom from cords in different work locations.
•Battery life often exceeds expectations, though having a second battery is useful for longer jobs.
•The guard is easy to adjust, adding convenience and safety during use.
•Built to last with high durability, making it a worthwhile investment for lonerm use.
•Offers good value for the money given its performance and features.
•Highly practical and essential for homeowners, mechanics, and various trades.

Cons

•The necessary wrench to tighten the grinder disks is not included, which can be inconvenient.
•The included allen wrench does not fit the grinder, causing some frustration during setup or maintenance.
•Battery life, while solid, only lasts several minutes under steady use, so continuous work requires extra batteries.

Bottom Line

The DEWALT 20V MAX Cordless 4 1/2 Inch Paddle-Switch Grinder (DCG408B) is a robust, lightweight cordless grinder that delivers near-corded-level power and reliable performance, making it a fantastic choice for both DIYers and professionals. Just remember you’ll need to supply the disk-tightening wrench separately and consider investing in at least one extra battery for extended work sessions. If you want a dependable, versatile cordless grinder without the hassle of cords, this tool definitely fits the bill.