Flip it out with the tailgate open to gain up to 2-feet of enclosed cargo area. Flip it inside and close the tailgate to keep tools and smaller cargo contained in the truck bed. Classic u-shape design provides maximum cargo capacity. PartNumber : amp74822-00A Description : BEDXTENDER HD™ MAX NPC : A NPD : Top 60% of Product Group Sales Value (Units x $, Hits, etc.) Title : BEDXTENDER HD? MAX Warranty : 3 Year Warranty WARNING CA Proposition 65 : No Truck Bed Accessories::Bed Bars