The Cosco 4-shelf, instant storage unit is a multi-purpose shelf that assembles in about a minute without the need for any tools. You can use this Cosco folding shelf in your garage, basement, laundry room, work room, warehouse, or office. This Cosco folding shelf is made from powder-coated steel, giving it strength and durability. The interlocking shelves offer the unique ability to configure multiple Cosco shelving units together; by stacking and/or linking side by side. The assembly is very straightforward, just fold the frame out and clip the shelves in. Each shelf will hold 250 lbs. of your stuff.