An impact driver won't replace your cordless drill/driver, but it will expand your abilities.

BOZEMAN, Mont. — Do you have a DIY in mind, but don’t know what tool you should use to get the job done? This month we break down the differences between a drill and an impact driver in our ...

Most manual impact drivers also sport a three-eighths-inch or half-inch anvil to hold an adaptor, which also means you could put a socket on these and try to loosen a stuck hex cap screw.