Designed for those applications requiring an internal locking handle.
Suitable for both exterior and interior doors and recommended for glass panelled doors.
40mm Backset lock: (Please see Yale No1 for the 60mm backset)
Standard width door lock.
Internal lockable handle for increased security
Latch automatically deadlocks on closing the door
Snib function enables the latch to be held back
Includes 6 pin high performance cylinder