How We Research
Every guide on StoutBench starts with one question: will this product work for the person who is shopping for it? For our cordless impact wrench guides, that means your garage jobs, your wheels and the batteries you already own.
Here is how we answer it.
1. We start with the job and the battery
Lug nuts, suspension bolts and rusty fasteners ask different things from a wrench. A brand's batteries also tend to fit only that brand's tools.
We check the drive size, the torque numbers the maker lists and which battery platform a model uses. When your job limits the choice, we say what to check first.
2. We compare specs and features
We look at drive size (3/8 inch or 1/2 inch), fastening and breakaway torque, anvil type (friction ring or pin detent), speed settings, brushless motors, work lights, size and weight. We also note whether a model is sold as a bare tool or as a kit with a battery and charger.
DeWalt, Milwaukee and Makita describe their torque numbers in their own words, so we name the brand for every claim. We also note the warranty terms the maker lists.
3. We look at buyer feedback
We read through what buyers report after using a wrench. We look for patterns, like batteries that fade fast, tools that run hot, sockets that stick or lug nuts that won't budge.
One angry review doesn't sink a product. A pattern does.
4. We score each product
Our score weighs specs, features and buyer feedback against what you're shopping for. A wrench that's great for one job may score lower in a guide written for another.
Scores spread out on purpose. A 10 is rare.
5. We keep pages up to date
Products change, and some disappear from stores. DeWalt, Milwaukee and Makita each sell several impact wrenches with similar names and model numbers, so we check each one, and we only link new units.
When we update a guide, the "Updated on" date at the top changes with it.
What our picks are not
Our picks are research, not lab tests. We don't claim to have used every wrench we cover.
Our guides don't replace the vehicle's owner's manual or the tool maker's instructions. For wheel torque, use the number in the owner's manual and a torque wrench, and support a raised vehicle on jack stands.
We don't promise that any wrench will loosen every stuck fastener. When a maker makes a torque claim, we label it as the maker's claim.