Bought two of these over ten years to use with Medical Files and yearly tax receipts. Still can't resist buying another of my personal important papers. Can be locked with a small key lock through plastic lid. However plastic is breakable so it's not a "safe".
these boxes were just what I need to help organize my niece's files. She likes them because they are portable I liked them because they were light solid locking strong handles and a cool pencil box on top.