Vacancy indicator: This door indicator bolt is designed for toilets, restrooms, and bathrooms to show whether the room is vacant or engaged. The red color indicates engaged while the green color indicates vacant. The indicator provides a clear, ataglance status. Durable construction: Made of zinc alloy, this door lock is sturdy and antirust. It features a smooth finish for a sleek, modern look. It is built to withstand frequent usage and deliver longlasting performance. Easy installation and compatibility: Simple design and easy installation. Suitable for various doors and bulkhead doors. It can be installed on plates with thickness from 12 mm to 18 mm. It comes with all the hardware for a hassle installation. Applications: This indicator bolt is suitable for residential bathrooms and public facilities such as airports, stations, hospitals, shopping malls, and office buildings. It provides a clear indication of the room's status, improving privacy and convenience. Use scenarios: In a family home bathroom to signal occupancy to household members. In a public restroom with multiple stalls to indicate when a stall is occupied, reducing interruptions. In an office building, airport, or hospital facility to help users find available restrooms quickly and maintain privacy.