It is a swing pet door made of sturdy plastic, perfect for medium and large dogs. Reliable and innovative, it can be installed on different structures and materials: wood, glass, and metal, as well as brick walls. Note: Be careful when installing the door on tempered glass or double-glazed glass (the holes must be factory drilled). Equipped with a four-way closing system that allows for four different uses of the door: exit only, entry only, exit and entry, and full lock (your pet won’t be able to exit or enter). The swing door is equipped with a special protection system to keep air draughts outside. It also comes with a complete sliding tunnel, so it can be installed on thick doors as well. Choose the model to suit your pet's size.