IM Socket in the Electrical Industry and does a lot of rough work. It's a beast! Drilled 7/8 butt holes with ease. The high capacity battery lasted me a full day of drilling joists and studs. And best of all: no cables! The only thing I didn't like was the sensitive security feature. If you drill more than 2 bolts at the same time, the drill will stop! And you can't go back or forward! Your racquet is simply stuck in the wood and difficult to pull out again. But I figured out how to do it nonstop, you have to drill about two studs and then twist in the opposite direction to remove the wood, then repeat several times until you finish the material using this method, I've had no problems. Excellent drill.