WHAT DOES ANTI-PANIC MEANS?
anti-panic lockcase / panic excape lock /
Outside by key,inside door handle can open the door at any time .No need keys .
When an entrance door fitting is used the door can only be opened from outside using the cylinder.On the inside of the door,the door handle simultaneeously operates the latch and deadbolt to open the door ( the so called anti-panic function.)
Such kind of mortise are using of security of home entrance doors and hotel room doors.
And needs to match BS EN 12209 and also fire testing .