At Master Lock, the health and safety of our associates is always a priority. During this rapidly evolving time, we’re taking the necessary precautions to help reduce the spread of COVID-19 in our communities and our facilities while continuing to meet our customers’ needs. For the latest information and resources regarding COVID-19, please visit the CDC website.

Expanding an Existing Master Key System

Expanding an Existing Master Key System
  1. If Master Lock Company designed the original Master Key System, specify the key codes for the new locks.
  2. If Master Lock Company did not design the original system, Master Lock needs to review the following system information:
    • The complete key record (bitting list) of issued keys in order to eliminate potential duplication
    • Current system specifications, size and scope

Master Lock will expand the system where possible within the limits of the systems' original design and will contact you to discuss system details.

Please contact Master Lock Customer Service to discuss your system requirements at 800-308-9244.