Durable and safe: The door bar limiter is made of premium zinc alloy, which is not easily broken and maintains structural integrity. Reliable protection: The safety chain provides reliable protection for users. It helps prevent forced entry and allows identification of visitors before fully opening the door, adding an extra layer of security. Easy to install: This door guard safety limiter is easy to install and includes screws for secure attachment. The bolt can be firmly fixed to prevent detachment. Superb craftsmanship: This heavy-duty security door chain has a smooth surface that is comfortable to touch and safe to use. It is resistant to rust and maintains a like-new appearance over time. Wide application: Suitable for bedroom doors, windows, front doors, patio doors, hotel doors, and storage rooms. Provides security against forced entry and intruders.