High-quality Door Mounted Pet Door relieves you from being the “doggie doorman”. Designed with you and your pet in mind, quality, energy efficiency, safety, and security are priorities with Hale Pet Door. Our flexible double flaps are energy efficient and yet easy for your pet to open. Our extruded aluminum frame is more durable and secure than other pet door plastic frames. Our durable security cover will give you added peace of mind knowing you can close off your pet door as needed. Our Door Model is one of our most popular and one of the easiest to install. It works in most types of doors including wood doors, metal doors, hollow core doors, raised panel doors, and even multi-lite French doors. Its self-framing and self-supporting design make it easy to install in almost any door location. No need to frame out the door. Just cut the correct size of the rough opening in the door, slip the inside and outside frames together, and attach them with provided screws.