Yale B-85-CH-CH-40 Deadlocking Nightlatch, 40 mm, Chrome Finish, High Security with Automatic Deadlock

Deadlocking Nightlatch operated by key from outside, ideal if property is left unattended for long periods and for properties with multiple exit points
Convenient lever handle to operate the lock from inside the property
Internal snib button is used to engage the deadlock or temporarily hold back the latch
If the nightlatch is locked from the outside, it cannot be operated from inside
Includes Yale rim cylinder operated by key from the outside with standard security components
Supplied with 2 standard Yale keys and fixing pack