3327A and 3527A for all types of single and double doors, UL listed for Panic Exit Hardware. Devices are ANSI A156.3 – 2001 Grade 1. Fire Rated. The 3527A has a smooth mechanism case and the 3327A has grooved case. The surface vertical rod device is non-handed except when the SS (Signal Switch) option is used. 3327A/3527A fits door stiles as narrow as 1 3/4″ (44mm). Newly designed device has a one piece center case cover. Device Lengths: 3′ 2’4″ to 3′, 4′ 2’10” to 4′. Hex key dogging standard. standard rods accommodate 7′ door.