Caster weight capacity is 3500 lbs, sold separately.. Tough industrial powder coating finish. Heavy 16 gauge steel construction with 12 gauge feet. Recessed and concealed locking area protects padlock for ultimate security against drills and bolt cutter. Fully welded seams provide maximum strength. Recessed side handles for easy transportation. Reinforced overlapping lid provides protection from weather and forced entry. Heavy duty industrial lid stays prevents accidental closure. Tread plate design for rugged durability