Let the cat in and keep the dogs out. Our cat door holder allows the cat to go in and out of the room to look for food freely, the smaller space can prevent large dogs from going through the door to take food. Easy to install. No tools or glue needed, no modifications to the door. Simply hang the pet lock on the door handle and place the pin on the door frame to complete the installation. Achieve freedom of installation and disassembly. High-quality material. The pet door holder is made of nylon and stainless steel, which is very strong and can deter dogs, child-safe. Small things, big effects. Effectively stops puppies, large dogs, crawling babies and toddlers from entering rooms you don't want them in, such as the toilet, kitchen, bedroom, study, bathroom, storage room or office, the simplest tool for the most effective containment. The best choice for pet owners. Try the pet door lock. You no longer need to put your cat in a cramped pet cage, to give your cat a comfortable and independent space, protect the private space from larger animals.