DEWALT ToughSystem DS450 mobile storage allows you to take your tools with you to virtually any job Large wheels allow you to roll over bumps Handle telescopes out for easier pulling and is long enough to hold other interlocking ToughSystem boxes IP65 water seal keeps rain out of the box to prevent rusting tools Interior structural foam walls protect the tools against damage due to impacts Side handles for carrying and lifting Rotating opening handle for more volume Guaranteed Tough limited lifetime warranty against defects