Sliding arm FD499 Free-swing angle adjustable up to 180°. Closing force size EN 3-6. Doors up to 1400 mm wide. Specifications Hold open function No Type of product Standard (link) arm Door leaf Single leaf Close Connecion box FD145Connection box for door leaf installation. Sliding arm FD494Sliding arm with free-swing function. Mounting plate DC112Angle mounting plate for FD110 and FD111.