For cat passage: Offers a dedicated space with an ideal opening that allows for unrestricted cat movement while keeping out larger pets and small children in a thoughtfully designed cat-friendly environment. Adjustable for growth: With seven adjustable settings, this product caters to cats at every stage of life, from kittens to adult cats, offering a reliable pet growth solution made to meet the needs of modern pet-loving families. Safe and reliable protection: Incorporates stable anti-pinch technology with a focus on safety, offering double security and a user-friendly experience without compromising stability or ease of use. Tool-free installation: Designed for tool-free installation, this cat door attachment easily hangs on door handles, offering quick setup while protecting the paintwork on rental units. Convenient cat passage accessory: Suitable for various scenarios both indoors and outdoors, this portable cat door attachment allows for one-handed use and creates a dedicated cat passage for comfortable travel and everyday use, effortlessly enhancing your pet's independence.