1、Purpose Specific Design: The cat door stopper is ingeniously designed to keep your pet cat safe. By adjusting the door's width, it effectively allows cats to pass while keeping larger dogs out, thereby preventing dogs from spoiling the cat's food and litter. 2、Customizable Width: The width of this cat door is adjustable, allowing you to customize it according to the size of your pet. By simply loosening the small screws, you can slide the two components to the desired width and tighten the screw until it locks securely, leaving no room for sliding. 3、Convenient Usage: With our cat door stopper, accessing rooms can't get any easier. Just twist the knob or handle from either side of the door to open and enter. There's no need to manually lock and unlock every time you wish to step in or out. 4、Simple Installation: This door stopper comes with a simple to follow installation process. Users merely need to disassemble the existing strike plate from the door jam and use the existing screws to replace it with the door stopper strike plate. No adhesive is required, making it detachable and reusable, a perfect solution for renters and travelers. 5、Durable and Sturdy: Made from thick ABS material, our cat door stopper is sturdy and built to last. Instead of complicated child locks or cutting out a cat door, this adjustable door latch is the best choice for indoor cat doors, giving your cats their space back.