Kenny takes a look at the differences between the way an impact driver and hammer drill hit and the consequences of using both in wood and concrete. Spoiler alert: the hammer drill is faster in both, but the impact driver is easier on your wrist and can loosen stuck nuts and bolts that a hammer drill can't. #milwaukeetool #ptrmil20 #powertools #diy #howto #usethisnotthat #constructiontools | Pro Tool Reviews