For Door Stiles 4" or Wider.
9000 / 9100 Communicating Locks
+ Lock features a split deadbolt with each bolt operated by thumb turn on either side of the door. This allows each side of a "shared" door to lock independently and at the discretion of the respective user, thus eliminating the need for two separate doors in between adjacent rooms. The door is unlocked if both sides are unlocked.
+ 2 1/2" or 2 3/4" backset.