Services Centerville Locksmith provides a range of services to fit your needs from rekeying your house or office to setting up complex master systems. Request must be typed on company letterhead from the owner of the lock. not the owner of the key. Signed and dated by management (i.e. supervisor, manager, president, etc.) Centerville Locksmith feels Do Not Duplicate is the ineffective method of key control at best. We can supply you with information and hardware needed to accomplish a proper key control system. Note: The letters of authorization are not on file for future duplication. These are required per request for duplication. The letters of authorization do not include patented key blanks. Master Key: master-keying a lock will enable a lock to operate with two different keys. This type of service should be requested when restricted access is necessary for certain individuals. Key by Code: Key generated to factory specifications from the lock code usually provided on the lock (not the vin number on autos). This is also recommended by our staff when a key taken in for duplication is severely worn. Make key from lock: The original key that operated the lockwill be generated from scratch. This type of service should be requested when no code is available on the lock.