Automatic Flush Bolts
Inactive door locks automatically when the active door is closed; Inactive door unlocks automatically when the active door is opened.
Jean Wu
Self-Latching Flush Bolts
Opening the active door + Manually unlatching the top bolt = inactive door is accessible; Closing the inactive and active door leaf in sequence = inactive door is secured.
Manual Flush Bolts
Switching the lever/snib upward to unlock, downward to lock; You now have access control of the inactive door in your fingers.