Compatible with most T-slot accessories from Rhino Rack, Yakima, Thule, and many more. Increased Cargo Capacity Above & Below the Cover Constructed from heavy-duty aluminum slats in a scratch-resistant matte finish The patented low-profile design incorporates a front cover that is flush with the truck bed cover Compatible with most T-slot accessories from Rhino Rack, Yakima, Thule, and many more.; Increased Cargo Capacity Above & Below the Cover; Constructed from heavy-duty aluminum slats in a scratch-resistant matte finish; The patented low-profile design incorporates a front cover that is flush with the truck bed cover; Sealed ball-bearing rollers mounted onto the aluminum support beams allow the RetraxPRO XR truck bed; Legendary Lifetime Guarantee