“Tailpiece for use on Marks cylindrical lever or knob lockset. Works with Schlage, Primus or Corbin-Russwin KIK key in knob conventional cylinder. To be used on entry, or storeroom function Marks locksets. Hardened steel, Brass color , For use on other manufacturers cylindersUsed for S – Classroom DA – Vestibule DB – Classroom Intruder DC – Communicating SB – Communicating Classroom T – Corridor”
