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2. Police lock - Wikipedia

   en.wikipedia.org/wiki/Police_lock

   A police lock is a type of high-security door lock.There are two distinct kinds of police lock. Overview Floor-mounted police lock schematic. The first is floor-mounted. It consists of a steel bar running on at a roughly 45° angle from the center of the door to the floor, on the inside of the area to be secured.

3. Door security - Wikipedia

   en.wikipedia.org/wiki/Door_security

   Door security. A metal doorframe with a strike plate built in: in other doors this would be a metal strikeplate in a wooden doorframe. The term door security or door security gate may refer to any of a range of measures used to strengthen doors against door breaching, ram-raiding and lock picking, and prevent crimes such as burglary and home ...

4. Crash bar - Wikipedia

   en.wikipedia.org/wiki/Crash_bar

   Crash bar. A crash bar (also known as a panic exit device, panic bar, or bump bar) [1] [2] is a type of door opening mechanism which allows users to open a door by pushing a bar. While originally conceived as a way to prevent crowd crushing in an emergency, crash bars are now used as the primary door opening mechanism in many commercial buildings.

5. Drawbar (defense) - Wikipedia

   en.wikipedia.org/wiki/Drawbar_(defense)

   Drawbar (defense) A drawbar is a defensive implement used to secure a door or gate in a medieval or Early Modern building such as a castle, [1] [2] but also churches and townhouses. When drawn across the full length of the door, it prevents the door or gate from being opened. To open the door or gate, the drawbar is pushed into a drawbar slot ...

6. The Best Home Security Cameras of 2022, Tested and Rated - AOL

   www.aol.com/best-home-security-cameras-2022...

   Buy: Ring Video Doorbell 4 $219.99. Buy: Ring Video Doorbell 4 $199.99 . Ring makes some of the best video doorbells around. The Ring Video Doorbell 4 takes the runner-up position because of its ...

7. Mantrap (access control) - Wikipedia

   en.wikipedia.org/wiki/Mantrap_(access_control)

   A mantrap, security mantrap portal, airlock, sally port or access control vestibule is a physical security access control system comprising a small space with two sets of interlocking doors, such that the first set of doors must close before the second set opens.