LM Series (ANSI/BHMAGrade 1)

12 (E2171): Classroom
(Function: Deadbolt is operated by key from outside, thumb turn inside retracts the deadbolt but can’t project it.)

13 (E2161): One-Way Deadbolt Cylinder only, Black plate inside.
(by key oustide. No inside operation.)

50 (E2190): Thumb Turn Only Deadbolt
(thrown or retracted by thumb turn inside. No outside trim.)