Superior Strength – Heavy-duty polypropylene built for durable hauling Raised Walls – Keep contents on top and bottom shelves contained Top Compartments – Round and rectangular compartments keep small items like cords and tools organized Multi Tiered – Two shelf tiers encourage neat organization Rolling Casters – Omnidirectional casters facilitate easy maneuvering on both smooth and carpeted floors Rounded Corners – Smooth corners protect cart edge and walls from impact damage