The built-in cat door design allows your cat to freely enter and exit the room, looking for their own cat food and litter. At the same time, the closed door can prevent other family members from entering, effectively isolate odors and give you fresh air. Outstanding features of the indoor pet door: 1. It gives your cat a separate space and prevents your child from accidentally entering the room with the cat litter in the event of an accident. 2. The simple and generous cat-shaped design, cute and low-key, can be easily incorporated into your home renovation. How install a cat flap? 1. Remove your door and set it on the workbench. 2. Stick the provided template on the bottom of the door. 3. Trace an outline of the model using a pencil or pen, then remove the taped model. 4. Using a jigsaw, cut out the hole following the outline. 5. Place the front of the cat flap over the hole to check the fit. 6. Mark the 4 screw holes. 7. Drill screw holes. 8. Apply 8 screws and rubber screw cap --- 4 screws each side. Package Included: 1 x Cat Flap8 x Screws1 x Instruction and Template