These windows are suitable for all types of property but are particularly suited to high-rise applications such as and townhouses, offices and apartments. These windows are centrally pivoted either horizontally or vertically, rotating through 180 degrees and have built-in restrictors to limit the opening depth for easy and safe maintenance of the window from the inside of the building. These slim sightline windows are a popular choice with architects and specifiers as they combine practicality with pleasing aesthetics, and allow high levels of light to reach far into the building.