A big problem when drilling holes in the ceiling is the dust falling on your face and spreading around the room. If we drill more holes – this may be a problem. However, you can protect yourself against this by installing on the front, the cylindrical part of the drill, a cover cut from a rubber or plastic ball half. We cut a hole of this diameter in it, to place the ball tightly against the front cylindrical part of the drill. We put it on, it does not interfere with the rotation of the drill chuck.