Johnson Level & Tool 40-6791 Machine Mountable 360 Degree Detector with Clamp and Magnet

KEY FEATURES LASER DETECTOR: This Johnson Detector Tool is designed for use in combination with red beam rotary lasers. It quickly helps by detecting laser signals on large jobsite and in bright lights where laser beams are otherwise difficult to locate. 360 DEGREE RANGE: The universal laser visibility tool has a large 360-deg. detecting window allowing maximum detecting capacity. This 360-deg. range helps locate any unseen red beam signals from rotary lasers on indoor or outdoor jobsites....