A window shutter is a solid and stable window covering usually consisting of a frame of vertical stiles and horizontal rails (top, center and bottom). Set within this frame can be louvers (both operable or fixed, horizontal or vertical), solid panels, fabric, glass and most any other item that can be mounted within the frame. Shutters may be employed for a variety of reasons, including controlling the amount of sunlight that enters a room, to provide privacy, to protect against weather and to enhance the aesthetics of a building. The term window shutter includes both interior shutters, used on the inside of a house or building, and exterior shutters are used on the outside of a structure.