- 4-Way Locking Mechanism: Control your pet's access with ease. Choose from four settings—out only, in only, both directions, or fully locked—for enhanced security and convenience. - Size Compatibility: Designed for installation on doors and thin walls, this medium cat door measures 9.25" x 9.92" x 2.16" (W x H x D) externally and 7.08" x 7.48" (W x H) internally. The cut-out size is 7.7" x 8.3" (W x H), making it ideal for cats weighing up to 17.64 lbs and with a waist circumference of less than 23". - Effortless Installation: Our cat door is suitable for various door types, including sliding doors. With straightforward instructions, you can set it up quickly without any hassle. - Durable Construction: Crafted from sturdy ABS materials, this cat door flap ensures long-lasting use and security. It allows your pets to come and go freely while keeping your home safe. Use Scenarios: 1. Install on your back door to let your cat explore the backyard while keeping the door securely locked when needed. 2. Perfect for apartment living—allow your cat access to a designated room without needing to open the door constantly. 3. Ideal for pet owners who value convenience and security, ensuring your furry friend can easily access their litter box or favorite resting area.