This rotating self-leveling laser light is a great tool when working in a large room. The helpful light makes it easy to install molding or a chair rail.
The Intelli Beacon from Stanley Tools is a self-leveling laser light that rotates, sending a laser light spinning 360 degrees. The light indicates a perfectly straight line. This tool is useful in large rooms for marking the location where you want to install molding or a chair rail. It comes with a remote control that governs its speed and direction.