This is a patent-pending invention. The ONLY tool box you can put on your truck that does NOT require drilling. This tool box DOES NOT damage the truck (unlike everything else out there) and is therefore ideal for leased vehicles. There are two, one foot stakes that go into the holes on the railing of the truck. Simply lift up the whole unit. Then set stakes into holes on truck. Then box sits level on railing as in picture. My welder is holding this invention and can modify it - if necessary - to fit the stake holes on your truck.