Pet door for your pet to let themselves out, giving you a break from opening and closing door. Used with sliding glass door. No drilling holes or hardware needed. Very light making it easy to put in and take out. A slider door to keep your pet in and others out during bad weather, night time, or going out to run errands. Magnetic strip on plastic part of pet entrance and exit, to keep bugs out and air conditioning in, when your pet is using door.