This premium aluminum WinGuardⓇ double French door (FD750) is designed with a piano hinge that provides outstanding strength and durability. The 3-point locking system also helps enhance security in your home. Optional sidelites (slim windows placed on the sides of the door) provide additional natural lighting, and since it’s prepped for European-style hardware, it can elevate the architectural design of patios, master bedrooms, and more.