| Keying Options | Description |
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KD
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"Keyed Different" – Each lock has an independent cut. (Can
still be incorporated into a custom keyed system.)
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KA
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"Keyed Alike" – Group of two or more locks with the same key cut.
(Can also be incorporated into a custom keyed system).
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CK
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"Construction Keyed" [a.k.a. Protecto Keyed (PK)/Builder Keyed]
– Temporary builder key system used during the construction phase.
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CMK
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"Construction Master Keyed" – Combination of a construction key
system and a permanent master keyed system.
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Maison**
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"Keyed Common" or "Keyed to Pass" – Lockset is
keyed in a manner such that several random change keys (homeowner) are able to pass
through a common area.
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MK
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"Master Keyed" – Simple two level system; A group of locks
(KD, KA or both) that are operated by a change key (homeowner) and a single master
key.
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GMK
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"Grand Master Keyed" – Three level System where one
GMK (grand master key) opens all locks. Sub-master key (MK) only opens locks
within its assigned group. All individual locks have their own random change
key (homeowner).
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GGMK**
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"Great Grand Master Keyed" – Four level system where one GGMK (great
grand master key) opens all locks in the keyed system. Two different GMKs (grand
master keys) open only specific locks in system. Two or more MKs (sub-master)
only open assigned locks under their assigned GMK. All locks have their own
random change key (homeowner) Note: this type of system limits security.
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SFIC Ready
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Prepared to accept a Small Format IC core.
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LC
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Locks shipped "Less Cylinder".
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ZB
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Lock built with "Zero Bitted Cylinder" packed with two key blanks.
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