Lockset Cylinder, Mortise Cylinder, Commercial, Satin Chrome Finish, Material Brass, Number of Keys 2, Keyway Type Yale, Standards ANSI/BHMA A156.3 Type 1, For Use With Mfr. No. SDA16-1, Number of Pins 6, Includes (2) Keys Mortise cylinder lock is for key-controlled, magnetic exit door alarms.