More complex Master Key Systems can use Sub-Masters to control a limited group of locks. To illustrate, let’s use a sample business which has three departments: Administration, Sales, and Production. In the Sales Department, each salesperson would have a key to their individual office. While the Sales Manager would have a sub-master key allowing access to all sales offices. This would also be the arrangement for the other departments and department managers. However the General Manager would hold a Master Key allowing access to every door within all three departments.
The Master Key system is available with residential and commercial. For more information on those, click one of these links. Commercial. Residential.