DeWalt 20V MAX Cordless Impact Wrench Kit (DCF899) vs Milwaukee M18 FUEL 1/4" Hex Impact Driver

The DeWalt DCF899 is a 1/2" square drive impact wrench measured in foot-pounds — it's built to break loose large bolts and lug nuts. The Milwaukee is a 1/4" hex impact driver measured in inch-pounds — it's built to drive screws and smaller fasteners with control. Comparing their torque numbers directly (700 ft-lbs vs 2,000 in-lbs) is meaningless because 2,000 in-lbs is only 166 ft-lbs — the DeWalt has four times more raw torque. They belong in different drawers.

The DeWalt has three speed settings, which is useful, but the Milwaukee's 4-mode system includes a dedicated self-tapping screw mode that actively prevents stripping — something DeWalt doesn't offer at any price point in this category. In real use, this means you can drive a screw into thin sheet metal without blowing through it, or set a lag bolt without snapping the head off. For anyone doing varied fastening work, this isn't a nice-to-have feature, it's the reason professionals choose Milwaukee.

The DeWalt weighs 6.4 lbs bare and 7.2 lbs with its included 5-Ah battery. The Milwaukee is a compact 4.47" body designed to be light enough to use overhead and in confined spaces without fatigue. If you're swinging a tool for eight hours on a job site, that weight difference is the difference between going home tired and going home wrecked. The DeWalt's bulk is a necessary tradeoff for its torque output, but it's a real cost.

DeWalt's 20V MAX platform is solid, but Milwaukee's M18 system spans 200+ tools — from heated jackets to outdoor power equipment to specialized trade tools. Every M18 battery you buy works across all of them. The DeWalt ecosystem is competitive, but Milwaukee has made the M18 platform a genuine long-term investment that keeps paying off as you add tools. If you're just starting to build a cordless tool collection, the Milwaukee ecosystem has more runway.