Mr. Chain 72302 Loading Dock Kit Create an effective OSHA approved visual barrier at standard loading docks 48" in height or less Contains 2 Magnet Rings/2 Carabiners and 10' of 2" HD Yellow plastic chain Use between storage racks in warehouses and stores to block off an aisle way Use in manufacturing facilities for Lockout/Tagout Magnet strength in the Magnet Ring is 25 pounds