Dorex EM70 Medium-Duty Classroom Lever – Satin NickelEM70 C15 Classroom function suitable for doors that need to remain locked or unlocked for lengthy or specific periods Architectural quality for medium duty commercial applications High quality satin nickel finish For 1 3 8 to 2 door thickness 2 3 4 backset Optional backsets by special order: 2 3 8, 3 3 4, 5 Non handed field reversible Removable thru bolt mounting posts Lever length is approximately 4 1 2 3 rosette diameter 1 2 stainless steel latch