[High-quality material]: This door lock is made of high-quality nylon plastic, does not rust, is well-made, has a smooth surface, and is durable. It can be installed directly on the nacelle or flush door by screw surface mounting. [Easy to identify]: Green and red are bright and easy to see, easy to install, suitable for partition doors [Wide use]: Suitable for public restrooms such as airports, train stations, hospitals, shopping malls, and office buildings. It can also be used in restrooms, changing rooms, and bathrooms to indicate that the space is empty or occupied. [Unique design]: This lock is very suitable for preventing knocking when closing the door. The vacancy indicator (green)/attendance indicator (red) clearly indicates to everyone that the restroom is occupied from a distance. [Easy to Use]: With our bathroom indicator door lock, your customers can easily find the bathroom or changing room without waiting, without knocking on the door to confirm that someone is there, providing your customers with unlimited convenient and practical services. Quantity delivered: 5 pieces