Key benefits Auto closing: The builtin magnet automatically closes the door when your dog slides through the screen door, helping to keep pets contained and reduce door slamming. Manual lock option: Use the blue lock to keep the door securely closed if you want to prevent the pet from moving . Easy installation: Includes tool sets and clear installation instructions for a straightforward setup that is strong and resistant to pet abuse. Durable materials: Manufactured from quality ABS and nylon mesh, providing durability and resistance to damage from pets. Versatile compatibility: Designed for internal or external screen doors, windows, and any other screen areas. How it works When your dog passes through the screen door, the builtin magnet automatically closes the door. The blue lock provides a simple manual locking option for tighter control over pet access. Materials and durability Body: ABS Mesh: Nylon Built to be durable and withstand regular pet activity without easy damage Installation scope and compatibility Suitable for installation on internal and external screen doors, windows, and other screen areas Not suitable for very thick wooden doors, iron or aluminum doors, or walls Use scenarios Balcony or screened porch: Allow your dog to enjoy fresh air while keeping the interior space protected, with automatic closing to prevent wandering. Busy households: Use the blue lock during kitchen or dining times to prevent pets from entering certain areas while still enabling quick entry and exit for humans. Multientry homes or rentals: Install on screen door corridors to maintain airflow between rooms while maintaining pet containment without slamming doors. Notes For performance, install on appropriate screen doors or screen areas as described; not compatible with very thick doors, solid doors, walls, or nonscreen surfaces.