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For example, master keyed pin tumbler locks often have two shear points at each pin position, one for the change key and one for the master key. A far more secure (and more expensive) system has two cylinders in each lock, one for the change key and one for the master key. Master keyed lock systems generally reduce overall security. [2]
An arrow lock is metal and rectangular, measuring 2.005 in × 3.566 in × 0.620 in (50.9 mm × 90.6 mm × 15.7 mm) with a keyhole in the center. [2] When the user turns the key, a metal bar that normally protrudes from one side is moved through the lock to the other side.
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.
A skeleton key (also known as a passkey [1]) is a type of master key in which the serrated edge has been removed in such a way that it can open numerous locks, [2] most commonly the warded lock. The term derives from the fact that the key has been reduced to its essential parts.
As a further consequence of this fundamental difference, neither of these two key types can ever be cross- or master-keyed with the other. As a benefit to keying from blade tip to bow, a six, or seven-pin interchangeable core key blank can be machined to precisely fit a smaller five-pin system configuration.
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Master key may refer to: Master keying, a special type of key designed to open multiple locks; Master Key, a pricing game on The Price Is Right; Knight's Armament Company Masterkey, a door breaching shotgun; One of the encryption keys used in a Master/Session encryption scheme; Master Key, a South Korean variety show