AMP Research 77134-01A PowerStep XL Electric Running Boards Plug N' Play System for 2008-2016 Ford F-250/F-350/F-450 with SuperCrew Cab Provides a 3 lower stepping surface than the original PowerStep when deployed; When retracted, boards tuck up into a 6063 Marine grade aluminum rock rail for a bold, rugged look Automatic, electric-powered running boards instantly extend when you open your door, and then hides itself safely out of sight when the doors close; Includes low-profile, integrated LED light system. High-texture, powder coated finish for maximum grip and durability; High-strength, die-cast aluminum-alloy components and integrated bracket system support up to 600 pounds (each side) Weatherproof, OEM Quality electric motors, drive system and wiring harness; Pressure sensitive, pinch-proof technology Made in the USA and backed by a 5-year limited warranty