Concealed Vertical Rods 3600 Series (Fire-Rated), 8500 Series (Life-Safety) Concealed Vertical Rod Exit DeviceThe 3600 Series Fire-Rated Concealed Vertical Rod Exit De… 8600 Series (Life-Safety) Narrow Stile Concealed Vertical Rod Exit DeviceThe 8600 Series Narrow Stile Concealed Vertical Rod Exit … 3900 Series (Fire-Rated), 8900 Series (Life-Safety) Concealed Vertical Rod Exit DeviceThe 3900 Series Fire-Rated Surface Concealed Vertical Rod…