I have tried others and bought a Dewalt drill and impact driver with the smaller 1.5 batteries. Then i saw this bare tool and bought it. Tried it on lug nuts with the smaller batteries and i was amazed. I had a Prelude that i bought that had sat for a long time and the lugs looked rusted. The impact driver took the lugs right off, no hesitation. I just bought 2 more batteries also. The 20V XR 4.0 AMP and now this thing feels supercharged. I can't wait to start pulling the engine on this car. Great job Dewalt.