Baja Designs 3/8 Inch Tamperproof Security Hardware Kit with Locking Nuts - Anti-Theft Fasteners for Trailers, RVs & Outdoor Equipment

Neat idea and easy to install, but didn’t work for my ditch lights (they mount up near the windshield on steel mounts). A good twist of the lighting bracket and they would come loose, defeating the purpose. Probably best for lights mounted on a steel bumper or something like that, where you can really torque them down. Because of the design there is no way to add a lock washer or anything like that.