- Vacant or Engaged Indicator: This toilet/restroom door lock shows status at a glance. Red indicates engaged and green indicates vacant, providing a clear and easy-to-read indication system. - Durable and rust-resistant: Made of zinc alloy for sturdiness and anti-rust performance. Features a smooth finish for a sleek, modern look and reliable long-lasting use. - Easy installation and wide compatibility: Simple design with a hassle-free installation process. Fits plates from 12 mm to 18 mm thick and is suitable for various doors and bulkhead doors. Includes all necessary hardware for quick setup. - Practical applications: Ideal for residential bathrooms and public facilities such as airports, stations, hospitals, shopping malls, and office buildings. Clearly communicates room status to enhance privacy and convenience. - Use scenarios: In a home bathroom, it signals occupancy to household members; in an office restroom, it helps minimize interruptions; in airports or hospitals, it provides clear visibility of stall availability for staff and visitors.