Our COOKCOK 5-Tier Metal Storage Shelving Unit with Wheels. Foldable Shelf for Storage is constructed with powder-coated steel, offers durable enough shelves to hold heavy bins and boxes. This garage storage shelf each shelf holds up to 250lbs(without wheels), if installed wheels, each shelf only hold <200lbs(the top tier do not suggest put heavy duty goods). Slippery and durable wheels, which can be rotated 360 degrees, 2 of which have a locking function, so there is no need to worry about slipping. When folded, it can be placed in a narrow gap, behind the door, etc, saving space when not in use, and the side guardrail design can prevent objects from falling. No Assemble Required, easy to use. Adult.