I put two of these in different roles and the lids definitely switch places. I know it's a small thing, but I ordered them months apart. They are very accurate in size and the material is perfectly smooth. This isn't some crappy standard project box, they're ready to go in the field as soon as they arrive. No ridges to smooth, no thin spots, no cheap metal (they're aluminum). These are definitely boxes for industrial projects. I would say you can drive over them and they won't get crushed. I know I can stand on them and they don't even bend!