While exceeding safe school government standards (FEMA-428/BIPS-07) and complying with all building and fire safety codes, QID™ (Quick Intruder Deadbolt) classroom lock provides safe-haven solution while maintaining outside access for first responders and other authorized personnel. Deadbolt locking mechanism is activated by pushing red button, and visual indicator lets teacher know that door is secured. Fast-locking, 1 in. deadbolt and single-action egress promotes occupant safety.