A master key system lets one key open every lock while individual keys open only their assigned areas — the manager carries one key, each tenant or employee carries theirs. It is a practical fit for offices, storefronts, multi-unit rentals and HOA common areas.
Good key control is the other half: track who holds which key, collect keys at turnover, and rekey affected cylinders when control is lost instead of rekeying everything.
Planning the system
List every door, who needs access to what, and how the hierarchy should work before hardware is ordered. HSI Locksmith designs and services master key systems for South Florida businesses and property managers.