Abstract: A device used to mark mounting hole locations for hanging devices on a wall or other surface. The device has a rail with calibration marks printed or scribed thereon, and two movable marking brackets, each of which contains a marking or scribing element, in the form of a protrusion or center punch located on the back of the marking bracket. Also mounted to the rail is a movable leveling bracket which contains both horizontal and vertical levels. The marking brackets are set to a desired separation distance and the device is placed against the wall. The device is aligned using the levels, and then the device is pressed against the surface to cause the marking elements to create marks or indentations in the wall where the mounting holes are to be located.