Bestop 75404-15 Side-Mounted Trekstep for 1999-2016 Ford F-250/F-350/F-450; fits passenger side only; 6.8' and 8.0' beds Convenient access to toolboxes and gear from side of truck bed Bolts to frame on passenger side with hardware included for no-drill install Extends or retracts with just push of your foot more tools Rugged aluminum alloy linkages and high-strength steel mounts 400-pound capacity