- This innovative dog door features a switch-free design, allowing your pet to easily enter and exit from both sides. The back panel includes a removable block with a hole, enabling you to temporarily seal the door when needed, providing freedom for your pets while maintaining owner control. - Designed specifically for larger dogs, this versatile dog door is compatible with various door types, including wood, metal, glass, iron grates, plastic, and even walls, making it an excellent addition to your home. - Note: The included screws are evenly distributed for accommodating different door thicknesses. If the provided screws do not fit your installation, additional screws will need to be purchased separately. - Standard cut-out size for installation: 57.5 cm (22.6 inches) in height and 41.5 cm in width. Practical applications include: 1. Instantly allowing your large dog to access the yard for play or bathroom breaks without needing to open the door. 2. Providing a secure entry point for your pet while keeping other animals out, ideal for homes in rural areas. 3. Enhancing the convenience of pet ownership by allowing your dog to move freely, reducing stress for both you and your pet.