sturdy and durable peephole cover enhances your security. After the cover is installed, visitors cannot see through the peephole into your home, providing added safety. The 220-degree viewing angle allows you to easily identify visitors behind a closed door and view the entire surrounding area. The applicable door thickness is 55-90 mm, suitable for doors made of PVC, fiberglass, or metal. Easy to install, the door peephole can be replaced in 5 minutes without tools. Precise thread casting makes installation easy, the length is adjustable, and it is anti-twist, anti-slip, and anti-lever, protecting your home from burglary and break-ins. The inner wall is finely threaded, ensuring safety and preventing thieves from removing and destroying the door peephole with tools, making it more convenient to use.