The HES N-2-OPTION is a faceplate for use with Mortise locksets where the deadbolt is used for night-latch function only, in wood frame applications.  HES Electric Strikes

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 + N-2 option = 1006N-2.

N-2 (9" x 1-3/8") For use with Mortise locksets where the deadbolt is used for night-latch function only, in wood frame applications. Compatible Locksets: Accurate, Arrow, Baldwin, Marks, Omnia, PDQ, Schlage, Yale (8700), Others. 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 locked position.