Lexan panels are custom cut for you to fit your homes windows and sliding glass doors. The panels are designed so they slide easily into a ” h” header track which you fasten above your windows or sliding glass doors, and a studded angle or ” f” track which you fasten below the bottom of the opening. The hurricane panels are secured in place to the bottom tracks with washer based wingnuts. The ” h”header once installed above your openings will save you time and effort when you need hurricane protection