The SimonsVoss SV1C Digital Cylindrical Lock can be applied anywhere a standard commercial cylindrical lock is used without additional holes or wires. The SV1C allows the ability to easily grant user-specified access privileges with a few clicks of the mouse button instead of physically grinding keys. The access privileges may be removed even if the credential (transponder) is not available. Lost keys no longer require re-keying the locks and, in the overlay mode, the use of a new credential automatically replaces the previous credential. Lock options provide the ability to record transactions, control access by time and date, and provide connection to a wireless network.