Exterior shutters are available in many styles, style combinations, sizes and finishes. Louvers, panels and boards & rails are the 3 main style elements that can be use alone or in combinations to create a unique exterior enhancement. Design elements such as hardware and cut-outs are often used to make a statement as well. Nowadays most exterior shutters are affixed to the window frames and used only as a decorative element although they can be mounted on hinges and have function if that is the homeowners choice.