- Designed specifically for large dogs, this versatile dog door can be installed in various types of doors, including wood, metal, glass, iron gate, plastic steel, and even walls. - The innovative door features a switchless design, allowing your pet to enter and exit freely from both sides. The back panel includes a practical block with a hole, enabling easy temporary sealing when needed. This combination provides your pets with the freedom to roam while you maintain control over their movements. - The standard cut-out size for installation measures 57.5 cm (22.6 inches) in height and 41.5 cm (16.3 inches) in width, accommodating large breeds comfortably. - Please note that the screws provided are evenly distributed from the factory to fit various door thicknesses. If the included screws do not suit your installation, additional screws will need to be purchased separately. Use Scenarios: 1. Perfect for homes with a large dog that needs easy access to the yard for playtime or bathroom breaks, enhancing their independence. 2. Ideal for dog owners who want to minimize disruptions caused by frequent door opening, allowing pets to come and go as they please while you focus on daily tasks. 3. A practical solution for pet-friendly public spaces, such as doggy daycare facilities, where multiple dogs require easy access to outdoor areas.