What We Like About This Mobile Roll File Perfect for getting the home or office ship-shape. Mounted on four swivel casters should you need to relocated your documents, this roll file has all the simple benefits that will have you wondering why you don"t have one already. Four large compartments create ample organizational possibilities. Large, mobile roll file with four compartments * Four, dual wheeled, swiveling casters * Strong wire frame with protective, white plastic coat * Four large compartments * Custom-fit bottom dust protector