How to Get a Key for an Old Metal Cabinet
Try to Find the Original Key Before attempting to force or replace the lock, take some time to thoroughly search for the original key. Check the usual spots keys get lost - junk drawers, key racks, and so on. Also look through the belonging of anyone else who may have had access to the cabinet. If it was used for storing important documents, the key may have been placed in a secure location like a safe deposit box. Don't give up...