This worked great for drilling 3 and 4 1/4 inch holes into my concrete patio for drains. I used it to drill 3-3 holes and 3-4 1/4 holes through 6 inches of concrete/tile. For the price you can_ beat it. The only small issue I had was that I had to modify the connection for the hose, as it does attach to a common water hose. But again, for the price of the drill, it was no problem.Ryan McKernan