Impact drivers have two major advantages over traditional drill/drivers: lighter weight and much higher torque. And the impact action makes big screws seem to melt into the wood, seldom stripping their heads in the process. A new wave of these tools with brushless motors promises even more power and battery life in the same compact package. To see if that promise is worth the higher price, we put these new drivers to the test, giving them real-life challenges to evaluate power and control, battery life, steady torque and peak torque. The tests found that these new tools do pack a lot of power into a small package. The models tested include: Dewalt DCF895C2, Dewalt DCF895L2, Hitachi WH18DBDL, Makita LXDT08, and Panasonic EY7550.

From Fine Woodworking #230