Create an effective visual barrier using this danger 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 of the Danger in and around stairwells or other openings where a person could fall and be injured. The Mr. Chain Danger Sign Kit can also be assembled in seconds to mark off aisles in retail stores, warehouses, or distribution centers.