This 5-tier storage shelving unit is built with a rib-reinforced SPCC carbon steel frame for dependable heavy-duty organization in garages, workshops, warehouses, basements, and kitchens. Each shelf supports up to 500 lbs, with a total capacity of 2500 lbs for tools, storage bins, appliances, and bulky supplies. The adjustable shelf design helps you customize spacing for items of different heights. It can also be split into 2 shorter units for more flexible placement and workspace use. A snap-on design allows quick assembly without screws or nuts.