Petsafe 4-Way Locking Big Cat Door for Doors

Larger cat door opening to accomodate bigger cats Built-in locking system with four settings: open, closed, in-only, out-only Available in one neutral color for all frame colors The big cat pet door is a generously sized lockable cat door that gives larger cats private access to their litter box or the outdoors. This door is perfect for keeping your dogs out of the cat's space as well as making sure no one can use the cat door late at night. This door features a four-way locking system that allows you to control how much access your feline has. You can choose between four options: completely open, completely closed, outdoor access only, or indoor access only.  Features For cats or small dogs Transparent flap for easier pet usage  Install in wooden, PVC, metal and glass interior or exterior doors and windows DIY installation 4 lock options: open, locked, in-only and out-only Flap opening measures 7 1/8 in X 7 15/16 in Benefits Controls when and how cats use the pet door Larger