Best 3/8 inch drive impact wrenches

Top pick: Milwaukee M18 FUEL 3/8" impact wrench. It's the one I'd hand a home mechanic: real breakaway torque for suspension and brake bolts, a compact body that fits behind calipers, and the M18 battery platform you can share with other Milwaukee tools. The bundle with a battery pack means it works out of the box.

Who the others suit:

• DEWALT ATOMIC 20V (DCF923B) — the best all-round alternative if you're already on DeWalt 20V batteries; strong torque in a short body.
• Milwaukee 3049 — the premium cordless choice when you want maximum power and don't mind a bigger tool.
• DEWALT DCF903B 12V — light, small and brushless, ideal for interior trim, dash and engine-bay fasteners rather than lug nuts.
• RYOBI ONE+ HP 3/8" — the budget-friendly pick for occasional weekend jobs; lower torque, so keep it to lighter fasteners.
• Greenworks Pro 24V — decent breakaway torque for the money if you already own Greenworks batteries.
• ACDelco G12 — a compact 12V option for light assembly work.
• VEVOR air impact — if you have a compressor, air gives you steady power for the money, but you're tethered to a hose.
• Avhrit AT450 / AsterOutdoor — cheap entry-level cordless guns; fine for light duty, not for stubborn suspension bolts.

Skip the 1/2"-drive Ryobi P262 and the right-angle Milwaukee 2564 if you specifically need a 3/8" square drive.