Usage Tips:XUEMEI Toilet Door Lock With Red And Green Indicator Replacement Parts Indicating Dormant Lock For Public Toilet Material: zinc alloy. Use: They can be widely used in airports, stations, hospitals, offices, restaurants, shopping malls, offices and other public restrooms. Easy to install: The latch can be mounted directly on the cabin or recessed panel door, easy to install and convenient to use. Empty (green) / Engaged (red). Pretty design: no more awkward knocking to see if there is someone in the toilet. This empty (green) / engaged (red) indicator directly indicates whether the room is occupied. Instructions: 1. Made ofzinc alloy, beautiful appearance, corrosion resistant, attractive and durable, not easy to fade or rust. 2. Surface mount with bolt fixing and can be mounted directly on the cabin or recessed panel door. 3. Scope of delivery: 1 x turn signal lock (with screw).