Create an effective visual barrier using Mr. Chain Closed Sign Kit. Ideal for use in a variety of retail and professional environments. Simply put the carabiner on the magnet ring, put the chain on the carabiner, and stick the magnetic end on any metallic surface. Warn those that an area is Closed whether it is a stairwell or other openings where a person could fall and be injured. The Mr. Chain Closed Sign Kit can also be assembled in seconds to mark off aisles in retail stores, warehouses, or distribution centers.