3347A and 3547A for all types of single and double doors, UL listed for Panic Exit Hardware. Devices are ANSI A156.3 – 2001 Grade 1. The 3547A has a smooth mechanism case and the 3347A has grooved case. The concealed vertical rod device is non-handed except when the SS (Signal Switch) option is used. 3347A/3547A fits door stiles as narrow as 1 3/4″(44 mm), wood door stiles as narrow as 4″(102mm). Newly designed device has a one piece center case cover. Device Lengths: 3′ 2’4″ to 3′, 4′ 2’10” to 4′. Vertical Rods: Round 2 piece adjustable rods; Top rod adjustable from 6’8″ to 8’4″. This device has the Cylinder Dogging option. Cylinder not included.