EXTRA LARGE SIZE CAT DOOR ALTERNATIVE: We upgraded the cat door latch to address the problems on the market. New fish integral design with 3D fisheye, made of environmentally friendly materials, no odor. It is designed to be longer, more flexible and less damaged than ordinary products. LET'S CAT IN & KEEPS DOGS OUT: Pet latch easily hooks onto most doorknobs and will safely hold the door, protecting your cat's private space from larger animals! And Can withstand the impact of large domestic animals. 5 ADJUSTABLE SIZES: 5 Function holes allow the door prop open for cats (from 2.5" up to 6"), and the gap is wide enough so cats can easily enter, while narrow enough so dogs and babies cannot go through. You no longer have to put your cat in a cramped pet cage, perfect solution for the kitty to have privacy. EASY TO INSTALL AND USE: No tools and glue are required, no modifications to the door. It only takes two steps to let your pet enjoy an independent private space: hang it on the door handle, and then link the door frame lock slot. THE BEST CHOICE FOR PET OWNERS: Effectively stop crawling babies, early toddlers, large dogs, puppies from entering any unwanted and unsafe room such as laundry, bathroom, closet, bedroom, pantry or office.