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Commercial Master Key Systems Explained

By Mega Lock And Key · MD Locksmith License #394 ·

A commercial master key system lets each person carry one key that opens only the doors they need, while managers carry a master key that opens everything; restricted keyways such as Medeco or Mul-T-Lock keep those keys from being copied without your authorization.

How the levels work

  • Change keys open one door or group, such as a single office.
  • Master keys open every door in a section.
  • Grand master opens everything in the building.

Planning a system

Start with the doors and the people: who needs which doors, and which doors only managers should open. Shared doors such as the front entry can be keyed so everyone's key opens them.

Restricted keyways

On a standard keyway, anyone can copy a key at a hardware store. High-security cylinders from brands like Medeco and Mul-T-Lock use restricted keys that can only be duplicated with authorization.

When staff change

Rekey the affected doors instead of replacing hardware. A well-planned system makes that a small job.

Hardware we service

Schlage, Medeco, Mul-T-Lock, Von Duprin, Corbin Russwin, Sargent, dormakaba, Yale, LCN, and ASSA ABLOY. See commercial locksmith service in Baltimore, including panic bars and access control.

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