The stand-alone Gaffer Tray (FIX-F41T) is an accessory, sold separately.  The Gaffer Tray holds the removable LED panel.  The KinoGrip center mount and the LED controller can be attached.  The tray allows for a smaller profile fixture without having the need to bend the plastic barndoors back.  When the mount and controller are removed, the tray can be screwed into the wall or ceiling through its screw points.