AMP Research 74815-01A Black BedXTender HD Max Truck Bed Extender for 2007-2018 Silverado & Sierra with Standard Bed Classic U-Shaped design for maximum cargo capacity Flip it out with the tailgate open to gain up to 2-feet of enclosed cargo area or flip it inside and close the tailgate to keep tools and smaller cargo contained in the truck bed Torque-resistant clam-shell design with composite uprights and rounded-rectangle, 6063 T6 aluminum alloy tubes with durable powder coat finish Easy assembly and installation Made in the USA and backed by a 3-year limited warranty