Concealed closers are often preferred in domestic and high end applications. Jamb mounted versions range from the BSEN1154 conforming adjustable Powermatic down to the original Perko. Overhead concealed closers combine the efficiency of overhead closers with the aesthetics associated with concealed closers and consequently are often found in hotels and quality developments. Overhead Concealed door closers integrated (fully concealed) door closers available in single or double action and optional mechanical or electro hold-open. The closer is completely concealed into the door leaf, or head frame. The guide rail is only visible when the door is open