🐱 4 WAY LOCKING : The cat door with lock have 4 switch modes, the pet doors for cats could be adjusted by the red and green switches with tabs, can be set to open, in only, out only or fully locked, easily adjustable making it easy to keep your pets in or out | 🐱 EASY TO INSTALL : The cat doors for interior doors have detailed installation steps, this large cat door can be installed easily in a short time. 8 screws and its caps included in the set make you easily install in doors, cupboards, panels and walls, etc | 🐱 SAFE&THOUGHTFUL : The cat door with lock have transparent cat flap that cat can see through. The pet doors for cats have silent brush that can reduce the noise from the door closing. 4 way locking of the big cat door meets cat's daily need. The cat flap door with magnet that let the flap can be quickly reset when the cat passes. Inner frame edge of the cat interior door get polished, so as not to hurt cat | 🐱 SIZE : The large cat door is made of ABS material, weather-resistant, the surface is smooth and durable. The inner size of cat door with lock is 7.09" (W) x 7.48"(H). It's suitable for 【Weight】 < 17.64 lb 【Waist Circumference】 < 23.62" The outer size of pet doors for cats is 9.25" (W) x 9.84" (H) x 2.09" (D) | 🐱 100% SATISFACTION PROMISE : We promise you will love this large cat door, but if you do not satisfied with our cat flap door, please contact us, cat entry door which we provide not only 100% REFUND PROMISE, but also with 12 hours customer service. No questions asked