it attaches to the metal framework in the trunk. the elephant skin panels surround the toolbox, there are no screws that go through those pieces. if you are worried about the metal contact, put some thin neoprene fender washers between. the problem of the original toolbox is that weight pulls the screwheads through the box on bumps. the reinforcement with large metal washers epoxied to the box greatly expands the surface area. i have driven with my tools in this box and haven't had issues. i recently bought the new box, so i no longer have to worry about this issue.