QID Quick Intruder Deadbolt classroom lock provides instant activation and deadbolt protection to a classroom door. The lock has a red button that, when pushed, activates the deadbolt and locks the outside lever handle. A visual indicator shows the door is secured. The door can be unlocked by key from the outside, allowing access by first responders and authorized individuals. Single-action egress is possible from inside the room. The lock exceeds safe school government standards.