Whatever you put in the bed be sure to secure it. As a 35 year veteran of Law Enforcement I have personally worked 2 traffic accidents where a heavy object was not secured and came through the back window. One accident the female driver (a nurse) was decapitated by a tool box, the other a young teenage driver had his neck broken by a loose 22 inch aluminum wheel. Strap/Bolt whatever you use down tight to the bed.ðŸ›