NM-OPTION HES faceplate for use with Mortise locksets with a deadlatch positioned below the latchbolt and where the deadbolt is used for night-latch function only.  

All of the 1000 Series options are interchangeable.  The option kit contains all of the necessary parts to convert the 1006 into the particular model, i.e. 1006 + NM option = 1006NM.

NM (4-7/8" x 1-1/4") For use with Mortise locksets with a deadlatch positioned below the latchbolt and where the deadbolt is used for night-latch function only. Compatible Locksets: Best (45H & 47H, and 34H-37H), Corbin/Russwin, Falcon, Sargent (7800, 8200 & 9200 series). ANSI/BHMA Numbers: #E09391, #E09392, #E09393, #E09331, #E09332, #E09333. The latchbolt is released electrically during traffic hours. The deadbolt may be released electrically for emergency purposes. After releasing the lockset the keeper returns to the locked position.