9875/9975 Mortise lock device for all types of single or double doors, UL listed for panic exithardware. Fits stock hollow metal doors with 86 cutout and door stiles as narrow as 4 3°4 in. 121mm. The 7500 Mortise lock is equipped with a 3°4 in. 19mm anti-friction latch bolt which is fieldreversible without removing the lock from the door. It has a non-handed auxiliary bolt fordeadlocking and a faceplate with an adjustable bevel.