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  2. Three-point locking - Wikipedia

    en.wikipedia.org/wiki/Three-point_locking

    Three-point locking, or a multipoint lock, is a locking system installed in cabinet or locker doors to enable more secure locking. Whereas in single-point locking , the door on a cabinet locks only at the point where the key is turned, halfway up the edge of the door, three-point locking enables the top and bottom of the door to be ...

  3. Bored cylindrical lock - Wikipedia

    en.wikipedia.org/wiki/Bored_cylindrical_lock

    Some commercially-sold doors may come prepared to receive one or more bored cylindrical locks, such as entry doors, which typically require both a door knob and dead bolt. [ 2 ] In the United States, typically, the face bore is sized from 1.5 to 2.125 inches (3.81 to 5.40 cm) in diameter and is centered at 2.375 or 2.75 inches (6.03 or 6.99 cm ...

  4. Tubular pin tumbler lock - Wikipedia

    en.wikipedia.org/wiki/Tubular_pin_tumbler_lock

    A tubular lock and key. A tubular pin tumbler lock, also known as a circle pin tumbler lock, radial lock, or the trademark Ace lock popularized by manufacturer Chicago Lock Company since 1933, is a variety of pin tumbler lock in which a number of pins are arranged in a circular pattern, and the corresponding key is tubular or cylindrical in shape.

  5. Breaching round - Wikipedia

    en.wikipedia.org/wiki/Breaching_round

    A US Marine practices shotgun door-breaching techniques. A breaching round or slug-shot is a shotgun shell specially made for door breaching.It is typically fired at a range of 6 inches (15 cm) or less, aimed at the hinges or the area between the doorknob and lock and doorjamb, and is designed to destroy the object it hits and then disperse into a relatively harmless powder.

  6. Trapped-key interlocking - Wikipedia

    en.wikipedia.org/wiki/Trapped-key_interlocking

    This is a trapped-key interlock on the door of an electrical switchgear cabinet. It is attached with one-way security screws to discourage casual removal, which would defeat the interlock scheme. Trapped-key interlocking utilizes locks and keys for sequential control of equipment and machinery to ensure safe operation. Trapped-key interlocks ...

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