Grinders

Most useful first click

Dremel 4300-5/40 Rotary Tool Kit

Best for Most Buyers: The better buy for most people. The chuck, the light and the stronger motor are upgrades you use on nearly every project.

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Best Overall

DeWalt DCG405B 20V MAX 4-1/2"

Best Overall Cordless Under $100: The best cordless grinder within this budget tier -- brushless motor, disc brake, and the DeWalt 20V MAX platform.

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Best Overall

Milwaukee 2880-20 M18 FUEL 4-1/2-Inch / 5-Inch Braking Grinder

Best Cordless Metalwork Pick: The most flexible cordless configuration here for buyers already invested in M18 batteries.

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Best Corded: Sustained Heavy Grinding

DeWalt DWE402 4-1/2-Inch Corded Angle Grinder

Best Corded: Sustained Heavy Grinding: 11-Amp motor with 11,000 RPM -- sustained heavy grinding without voltage drop

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Start with the grinder type and job. Angle grinders, bench grinders, die grinders, and rotary tools solve different problems, so broad top-pick claims are kept inside specific subcategories.