Availability and Occupancy Indicator: Are your guests constantly disturbed and hesitant to use the restroom? With this availability indicator lock, your guests will no longer have to search for the restroom, and especially identify available rooms. The availability (green) / availability (red) indicator easily shows if the room is occupied. Premium Metal Material: Made of high-quality stainless steel, rust-proof, with a smooth and wear-resistant surface. It is compatible with door panels with a thickness of 12 to 18 mm. Practical and Effective: This product is ideal for avoiding knocking on the door as soon as it is closed. The availability (green) / availability (red) indicator clearly indicates to everyone that the restroom is occupied. No more 10-minute waits. Multiple Applications: Ideal for toilets, shower stalls, and bathrooms. Ideal for elegant, durable, and wear-resistant public places, such as volleyball courts, gyms, airports, train stations, hospitals, restaurants, shopping