I use to engrave my driver’s license number on power tools and other expensive stuff I own. This saved me once when I had a generator stolen. The pawn shop that had it didn’t like it but then had to give it back to me. The only problem with this is I recently updated my license to an enhanced driver’s license. The driver’s license number that I have had for the past 46 years is no more. I have lots of engraving to do now.