Create Extra Storage Space Easily Use the empty space on top of your tool box Store chain, straps, safety accessories and more Lower your deck to secure your equipment Aluminum box tops are 4" tall x 16" deep 33" long model has 1 divider 48", 65", & 84" long models have 2 dividers Easy, screw-down mounting for fast installation Made from rugged 1/8" aluminum for long life