The core drill worked very well. It had plenty of power for 4" cores drilled to depths of 8 to 12 inches.I liked the power switch location and operation. The core drill and frame is light and easy to carry.The included water supply hose is flimsy and should be replaced with a higher quality hose. The wrench inset on the stem is narrow. We had to grind down our wrench to fit the narrow inset.