With pet doors, you can install special doors in interior or exterior walls, or in people’s doors. It processes a ferromagnetic snap lock and 2 rotating sliding nuts for pet access control. by professionals manufacturers, Featuring polished inner frame edges and a silent brush to ensure your baby’s fur is not hurt. This is very convenient and allows your pet to come and go freely. Special feature: 【4 LOCKING SYSTEMS】 - By switching the 2 sliding nuts, the door has 4 modes: in only, out only, in and out and fully locked. It’s easy to control and lets your pet come and go freely. 【Auto-Close】-with ferromagnetic buckle. The door will automatically close after the pet has passed through the door, preventing mosquitoes from entering the house. 【HIGH QUALITY AND DURABILITY】 - The frame is made of high quality ABS plastic for durability, while the transparent flip cover allows pets to see through the door. 【Considerable Details】- The edge of the inner frame is polished to avoid hurting the