CLIQ® Control Key (C-Key)

Mul-T-Lock’s world-renowned and award-winning locking and access control solutions are as diverse as the needs they address. From High Security, simple yet strong locksets for the residential market through to our sophisticated electromechanical access control solutions, Mul-T-Lock’s wide-range of products and solutions provide the protection our customers seek.


The CLIQ® Control Key (C-Key) manages the electronic communication provided by the CLIQ® system.
It provides users secure access to the system software and the ability to transfer information between the software and cylinders.

Each CLIQ® system must have at least one C-Key, referred to as the Master C-Key (MCK). The MCK is used to transfer information from CLIQ® cylinders to the software and not to open them.
For systems with more than one administrator, it is possible to utilize additional C-Keys, also referred to as a Normal C-Key (NCK).

Update key authorization lists within cylinders
Transfers audit trail information from cylinder to software
Facilitates secured access to the software

Temperature range: -10°C - 80°C
Encrypted (3DES) communication between C-key and software
Encrypted (3DES) communication between C-key and cylinder
Powered by a CR2032 lithium battery, which is easily replaced
Battery lifetime: 2 years
Design: MCK - Black with red inserts; NCK - Black with red and yellow insert

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