OVERVIEW The MILWAUKEE M12 FUEL 1/4" Hex Impact Driver is the Fastest Subcompact Impact Driver, the Most Compact, and provides Maximum Workspace Visibility. The POWERSTATE Brushless motor delivers the fastest driving speeds in the subcompact class for unmatched productivity. At only 5" long and 7.6" tall (with M12 CP 2.0 Ah battery), this solution is the most overall compact impact driver in class, allowing greater access in tight spaces and overall portability.