Panic Exit Device:
Double-sided locking: Locked/unlocked from both inside and outside using the key. Opened from outside using key and handle. Opened from inside using the panic push bar.
One-sided locking (external key only): Locked from outside with key. Opened from outside with key and handle. Opened from inside using the panic push bar.
Key-latch retracting from outside only: Locked from outside with key. Opened from outside with key rotation to retract the latch bolt. Opened from inside using the panic push bar.