Hold open arm DC191 Hold-open angle adjustable up to 150°. Hold-open mode can be enabled and disabled as required. Same installation as link arm. Cannot be used with fire and smoke protection doors. Specifications Type of product Standard (link) arm Door leaf Mounting position Hold open function Close Opening damper DC157Opening damper for sliding arm. Sliding arm DC892Sliding arm for concealed door closers. Sliding arm DC893Sliding arm for concealed door closers.