Access barriers and crowd control products manage heavy foot traffic in busy facilities and outdoor events, restrict access to prohibited areas, block hazards, protect pedestrians, and guide motorists. Detectors and scanners screen for potential threats and alert security personnel to the presence of metal or explosives. Doors and door frames reinforce entrances of facilities that require added security. Folding security gates expand and retract to restrict access across large doorways or openings. Key control and identification products manage keys and access to buildings. Locks secure property from unauthorized access and protect equipment from theft. Mailboxes sort and organize mail for businesses and residences. Safes are locking storage boxes that protect valuables from theft and damage. Security alarms and warnings prevent theft and emit loud sounds in case of emergency. Military, tactical, and public security equipment is used by military and public safety personnel to provide security, manage incidents, and protect themselves and civilians from threats. Security seals prevent tampering with shipping containers, freight, and totes. Video surveillance equipment installs in strategic areas to record and deter crime.