I bought one of the lapierre 20+ buck super sonic drill bits. I have to say, it does drill a great hole. I did almost 400 today 19/64, and still had life in the second 18v dewalt battery. Would have been nice if I put them on the charger at the pump house. Holes are clean and it drills quickly. I did like the instructions say, high speed and it does great. If anyone is thinking about getting one they seem to be worth the money to me.