I have the impact driver, 3/8 drill , & the sawsall in this series. I drove lags into old oak rafters with the impact most of the day yesterday. The small size is a great benefit. All fit in a Milwaukee packout with room for a charger & accessories. The batteries recharge very quickly, so a couple in rotation will keep you going all day. You can also get 3.0 ah batteries to improve performance. Most tools come with 1.5 ah, Home Depot has 2.0 s, with a little searching, you can find the 3.0's. They're well worth it.