The KROM-FB03C20D is a duro (C20D) spring loaded lever action flush bolt for use on commercial storefront and architectural aluminum and glass narrow stile doors. It features a rod extension with a 7/8″ throw and a 3/4″ backset. The rod length offers up to 5/8″ of adjustment. The face plate measures 15/16″ × 4-1/2″ and has 5/32″ radius corners. A 1/2″ square nylon tip with beveled corners helps prevent binding. The unit is supplied with a nylon keeper and fasteners.