New FLEX Impact Driver VS Milwaukee GEN 3 TOOL TEST (You Won’t Believe This!) We put the Milwaukee Gen 3 M18 FUEL impact driver up against the new FLEX tools 24V impact driver and you won’t believe these results! You have been asking for a tool test between Milwaukee and Flex for awhile now, today we show the #veyrcoolgang which brand comes out on top for the best impact driver. We decided to test both of these impact drivers to their limits by using spade drilling bits and driving lag bolts as our testing criteria. Let us know what you think of the #tooltestraw results in the comments section below and which impact driver is your favorite.