LET THE CAT IN, DON'T LET THE DOG OUT: The Cat Door Holder allows cats to freely enter and exit the room in search of food, and the smaller space prevents big dogs from going through the door and grabbing food. A good choice for pet owners. SIZE ADJUSTABLE: The functional holes can widen or narrow the width of the door opening. You can choose the gap size you want, it is perfect for blocking crawling babies, early toddlers, small dogs and even cats from entering a designated room. DURABLE MATERIAL: Durable, flexible and not easy to break. Made of high quality plastic material, very sturdy, can block dogs, safe and baby proof. BEST CHOICE: Flexible Latch Cat Door Fixer can effectively prevent dogs, large dogs and babies from entering any room you don't want them to enter. VERSATILE USE: The cat door retainer latch can be fitted to a variety of door handles or door frames, providing a flexible solution for pet owners. Unlike traditional cat doors, the latch can be easily installed without the need for costly modifications or break-ins.