Abstract: A drill assembly for use with a drill motor having a chuck is provided for drilling large holes in masonry materials. The drill assembly includes a tube having at least one masonry cutting element attached to one end. A rod has one end adapted to be received within and rotatably driven by the chuck of the drill motor while a clutch assembly mechanically connects the other end of the rod to the tube. The clutch assembly is movable between an engaged position and a released position. In its engaged position, the clutch assembly mechanically connects the rod and tube together so that they are rotatably driven in unison with each other by the drill motor. Conversely, in its released position, the clutch assembly allows relative rotational movement between the rod and the tube.