UNIVERSAL DOOR AND WALL DOG DOOR SYSTEM: Ideal for homes where standard doors can't accommodate a pet entrance, give your cats and dogs freedom to go in and out without your help, arrangement for potty breaks or play time by themselves. BUILT STRONG, BUILT SECURE: Unwavering quality and protection for Your Pets. Our pet door for walls is expertly crafted with advanced metal laser welding technology and features a stainless steel frame for exceptional durability and enhanced security. This robust construction provides a safe and reliable passage for your beloved pets, giving you peace of mind as they explore their world. ENERGY SAVER: Featuring a unique 2-flap system, our dog door for exterior walls offers exceptional weatherproofing and enhanced energy efficiency. The included slide-in closing panel and Removable Strong Magnetic Stripe, when the panel is locked, it cannot be opened from the outside and will not reduce the burglary resistance of the house.