Duramold exclusive engineered resin and metal composite structureprovides maximum load support. Structural foam and steel reinforced deckfor enhanced durability won·t rust. dent, chip or splinter. Molded-in tiedown slots for load security. Textured deck surface reduces load slippage.Perimeter deck channel retains small items. Two fixed, two swivel heavyduty polyolefin casters for optimal control, maneuverability and long wearlife over a variety of surfaces. Easy and quick assembly with commontools. Virtually maintenance free. Black.