I ordered one of these and it was twice both damaged in transit. It was not sent in a box. I finally went to the store to trade the item and they did not have the same one so I paid a couple of dollars more. The box itself is great for file storage. If you order more than one maybe the damage would not occur.
They do the job but they’re still plastic and made from petroleum. Cardboard isn’t strong enough and steel and aluminum and plywood are too heavy. There must be a better way. I’ll work on it.