YALE PBS3 & PBS4 Auto Deadlocking Nightlatch 40mm BLUX Visi

These Yale high security nightlatches not only provide the highest level of resistance against known attack methods but they also allow for easy egress in case of emergency. Supplied with an anti-pick 6-pin cylinder, the BS3 & BS4 nightlatch features an anti-saw bolt and deadlocks automatically on the close of the door. The latch cannot be locked from the inside to allow for easy exit in case of a fire or emergency.