Schlage L9453BD 17A Lever Mortise Lock Accepts Best SFIC Less Core

Schlage L9453BD - Ent w/DeadboltLatchbolt retracted by knob/lever from either side unless outside is locked by a 20 degree rotation of thumbturn. Deadbolt thrown or retracted by a 90 degree rotation of thumbturn. When locked, key outside or knob/lever inside retracts deadbolt and latchbolt simultaneously. Outside knob/lever remains locked until thumbturn is restored to vertical position. Throwing deadbolt automatically locks outside knob/lever. Auxiliary latch deadlocks latchbolt when door is closed. Inside lever is always free for immediate egress.