Our 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.