Crest Lock Co. is a second generation family business that started back in 1969. The business started as a traditional locksmith company, but a lot has changed in 46 years. Crest Lock Co. has migrated into specializing in electronic security and has become one of the leading integrators in the Baltimore area. Whether you need a one door access control system or a multi-door, multi-site computer based integrated system, Crest Lock Co. can handle your access control needs.