CRL key terms

The shaped opening and associated profile admitting a compatible key blade, distinguished from the key cutting pattern that operates the mechanism.

An uncut or partly prepared key form whose profile, dimensions and locating reference must match the intended cylinder or mechanism.

A locating feature used by a shoulder-stopped key to establish insertion position, distinguished from a tip reference on another key type.

A locating arrangement using the key tip as the relevant insertion or cutting reference, rather than assuming every key stops at a shoulder.

The sequence or pattern of operating cuts on a key under the relevant system, distinct from the keyway profile and from universal interchangeability.

The relevant boundary permitting movement in a specified tumbler mechanism when the operating components are aligned as designed.

The lock component containing the relevant key-operated mechanism, whose replacement or rekeying does not automatically change every other access-control function.

The rotating portion of an appropriate cylinder mechanism, distinguished from the surrounding housing and the complete door lockset.

An authorized key designed to operate a defined group of locks in a keying system, with scope established by that system design.

A key intended to operate its assigned lock or defined limited group under the keying arrangement, distinguished from a higher-level master key.

An additional pin segment used in an appropriate pin-tumbler master-key arrangement to create additional operating interfaces under the specified design.

A manufacturer-specific constraint on the difference between neighboring cut depths, reducing the usable set below a simple theoretical combination count.

The intended relationship between locking, unlocking and lever or knob operation on each side, distinct from appearance or brand name.

Movement toward an exit through the relevant route, whose permitted door operation must be distinguished from authorization to enter from outside.

A defined device behavior remaining secure on its controlled side when power is lost, which does not alone describe every egress function.

A defined device behavior releasing its controlled locking function when power is lost, requiring evaluation within the complete approved door arrangement.

Hardware controlling door closing under its design and adjustment limits, whose behavior interacts with hinges, latch, seals and air pressure.

An electrically controlled strike component interacting with a compatible latch, with operation and approval depending on the complete door assembly.

The organized authorization, issue, recordkeeping and recovery of keys or relevant duplicates, rather than merely keeping spare keys in one drawer.

Evidence that the requester may authorize the agreed work on the specified property, which should be established before access or modification.