Made of metal, it uses a thicker metal frame wire than other products and can carry up to 40 pounds of weight, making it more robust and durable than simple storage vehicles and under-bed storage bins. The accompanying Oxford cloth storage bag is made of 600D Oxford cloth and the bimetal zipper ensures that it will not be damaged after repeated use. Because it is designed as a folding structure, it only needs to assemble the wheels and the base plate to be used. There will be a wrench inside the package to help you secure the wheel. When dust is needed, it can be used with our storage bags. It can be folded to save space when not in use, and the bag can also be used alone. Ideal for seasonal under bed clothing storage, under bed shoes storage, bedding storage, etc.!