Usage Tips:Description Lets Cat in Keeps Dogs Out: Our Cat Door Latch allows the cat to enter and leave the room to look for food freely, the smaller space can prevent big dog from going through the door to grab food. Easy to Install: No tools and glue required, no modifications to the door. Simply hang the Pet Latch on the door handle and put the pin on the door frame to complete the installation. Realize the freedom of installation and disassembly. High Quality Materials: The pet door holder is made of nylon and stainless steel, which is very strong and can deter the dogs, safe baby proof. Small Things, Big Effects: Effectively stops puppies, large dogs, crawling babies, and early toddlers from entering any room you dont want them in, like toilet, kitchen, bedroom, den, bathroom, storage room or offices, the easiest tool for the most effective containment.