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 Mounting position Close Opening damper FD115Opening damper Mounting set FD113Mounting set for wide doors. Mounting plate DC112Angle mounting plate for FD110 and FD111.