Universal Rail Kit includes "bolt to the bed" baserails, Universal "L" Brackets and Hardware. Fits both #4100 And #4400 hitches. Fits:2007-2012 Toyota Tundra (Double Cab Only, 6-1/2' bed, Universal Rails with Custom Mounting Brackets) Country Of Origin: United States Model Number: 2748 Item Package Dimension: 48.0" L x 12.0" W x 9.0" H Item Package Weight: 50.0 lb MODEL NO - 2748