We ordered this part when we were laying laminate and the adapter plates needed to be bolted to the concrete base. Once we received the part, we attached it to the drill press, followed the instructions, and started drilling the holes. No matter how hard we pushed down on the drill, which had more than enough torque for the job to be done, the drill would not go through the concrete. We ended up using liquid concrete nails to attach the adapter plate to the foundation.