1. Suitable for door thickness 55-90mm, suitable for wooden doors, fiberglass doors or metal doors. Easy installation, the door mirror can be replaced within 5 minutes without tools. 2. Precision thread casting, easy installation, the length can be adjusted appropriately, anti-twisting, anti-slip, anti-pry, protect your home from theft and burglary. 3. 220-degree viewing angle, so that you can safely identify visitors behind the locked door, and can easily view the entire surrounding area of the person standing outside the door. 4. The inner wall adopts fine thread docking, which is safe and non-dangerous, which can effectively prevent thieves from using tools to pry and destroy the door mirror, and it is more convenient to use. 5. The sturdy and durable door mirror cover can improve your safety. After the cover is closed, visitors outside will not be able to see the situation in your home through the door mirror, providing protection for your safety.