The key which opens one particular lock. Usually a term used with Master-Keyed Suites.
A key that will operate only one lock or group of keyed-alike locks, as distinguished from a master key. See also keyed-alike cylinders and master key system.
(n.) 1. A key which operates only one cylinder or one group of keyed alike cylinders in a keying system. (n.) 2. Any device that is used to mechanically or electronically allow resetting of certain key or combination locks. Source: Lock Industry Standards and Training (LIST) Council A key adapted to open only one of a set of locks. Source: Dictionary.com See also: "reset key"
A change key is a key on the lowest level of a master keying system. Change keys are also referred to as day keys. Typically change keys are issued to personnel that require access to one or two areas in a facility.