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  2. Pin tumbler lock - Wikipedia

    en.wikipedia.org/wiki/Pin_tumbler_lock

    The first known example of a tumbler lock was found in the ruins of the Palace of Khorsabad built by king Sargon II (721–705 BC.) in Iraq. [1] Basic principles of the pin tumbler lock may date as far back as 2000 BC in Egypt; the lock consisted of a wooden post affixed to the door and a horizontal bolt that slid into the post.

  3. Disc tumbler lock - Wikipedia

    en.wikipedia.org/wiki/Disc_tumbler_lock

    The underside of a disc tumbler lock A key for a disc tumbler lock. A disc tumbler or disc detainer lock is a lock composed of slotted rotating detainer discs. The lock was invented by Finnish founder of Abloy, Emil Henriksson (1886–1959) in 1907 and first manufactured under the Abloy brand in 1918.

  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. Master keying - Wikipedia

    en.wikipedia.org/wiki/Master_keying

    A maison key system is a keying system that permits a lock to be opened with a number of unique, individual keys. Maison key systems are often found in apartment building common areas, such as main entrance or a laundry room where individual residents can use their own apartment key to access these areas.

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  7. Master Lock - Wikipedia

    en.wikipedia.org/wiki/Master_Lock

    Master Lock is an American company that develops padlocks, combination locks, safes, and related security products.Now a subsidiary of Fortune Brands Innovations, Master Lock Company LLC was formed in 1921 by locksmith-inventor Harry E. Soref and is headquartered in Oak Creek, Wisconsin.

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