Four control methods: The cat door has four locking methods, open inward, open outward, open in both directions, and locked. You can use this cat flap to control the cat's range of movement at will, without having to open the door or door. Easy to install: This cat door is suitable for brick walls, metal doors, wood doors and PVC doors. It can be installed in doors and walls with a thickness of 2 to 5 cm. A detailed installation drawing is included in the package, please follow the installation instructions. EASY TO USE AND CLEAN: This magnetic cat door is windproof, and the brush strip on the pet door can clean the garbage from the pet door and reduce noise. Our cat flap has three sizes and three models, you can choose the model and color according to the size of the cat. Safe and Non-toxic: The pet flap is made of ABS material, safe and non-toxic, and strong and durable. The middle flap is transparent design, which is convenient for observing the situation outside the door. Suitable for small dogs and large, medium and small cats, please rest assured use.