48 x 72 Flat-top box. Flat-top design provides more storage capacity for tall, bulky items, plus a large work surface for jobsite plans. Recessed and concealed lock protector inhibits forced entry and corrosion to lock. Channel reinforcements on lid, lock side panels into lid for added security when closed. Hinged lower shelf allows for easy storage of larger objects. Angled handle recess prevents pinch points. Hemmed (reinforced) high-strength shelves. Continuous, non-removable hinge pins help prevent theft. Side-wall storage. Strategically located, easily accessible, durable gas springs provide for ease in opening lid. Double hinge cover folds up and out of the way. New angled 3-1/2" high support skids feature threaded holes for easy caster installation. Patented, ergonomically designed fold-down recessed handles. Recommend #1 and #5 Masterlock padlocks or equivalent.