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2. Key blank - Wikipedia

   en.wikipedia.org/wiki/Key_blank

   The blank has a specific cross-sectional profile to match the keyway in a corresponding lock cylinder. Key blanks can be stamped with a manufacturer name, end-user logo or with a phrase, the most commonly seen being 'Do not duplicate'. Blanks are typically stocked by locksmiths for duplicating keys. The profile of the key bow, or the large ...

3. Key code - Wikipedia

   en.wikipedia.org/wiki/Key_code

   The bitting code is used in conjunction with a key's Depth and Spacing Number to completely determine all relevant information regarding the key's geometry. [1] Each number in the bitting code corresponds to a cut on the key blade. For example, a bitting code of 11111 with Depth and Spacing Number 46 specifies a Kwikset key with five shallow cuts.

4. Key duplication - Wikipedia

   en.wikipedia.org/wiki/Key_duplication

   The key to be duplicated is placed in one vise and the blank key to be cut in a corresponding vise under the cutting disk. The vise carriage is then into such position by means of a lateral-feed clutch that the shoulders of both the pattern and blank keys just touch the guide disk and cutter respectively.

5. Bitting (key) - Wikipedia

   en.wikipedia.org/wiki/Bitting_(Key)

   A bit key with its main parts labelled. Bitting is the depth of key cuts on a cylinder key for a pin tumbler lock, often expressed as a number. Bitting also refers to the combination of key cuts on a bit key for a warded lock or lever tumbler lock. The exact geometry of modern keys is usually described by a code system. [1]

6. Keycap - Wikipedia

   en.wikipedia.org/wiki/Keycap

   As its name suggests, the easiest way to compare key profiles is to look at them from the side. The keyboard profile refers to the profile shapes of each row of keycaps. With different profiles, keys can vary in size, shape, and thickness. When (most) modern key sets vary in profile from row to row, this is called a sculpted profile. [14] [15] [16]

7. Pin tumbler lock - Wikipedia

   en.wikipedia.org/wiki/Pin_tumbler_lock

   Each tenant is given a key that only unlocks their own door, called the change key, but the second key is the master key, which unlocks all the doors, and is usually kept by the building manager, so they can enter any room in the building. In a master-keyed lock, some or all of the pin chambers in the lock have three pins in them instead of two.