Add a screen door to any sliding glass door quickly and easily with no tools needed. Attaches to the doorframe with Velcro. Can be walked through even with full hands. Features a magnet to hold center closed. Instant sliding door screen creates a hands-free entry. Go ahead, leave the doors open, keep bugs out. Walk through with full hands! Easy alternative to expensive installed screen doors! Simply Velcro (included) to frame, magnets secure center closed. 36″ screen will fit a 72″ sliding glass door. 48″ fits a 96″ door.