The chairs are great. The instructions for how to build were non existent and/or inadequate. It was a picture of a chair and a base and simply said attach chair to base. There was no info on how to do it. A bag of metal plates in different sizes, washers, locknuts and screws with no further options or instructions.    I don’t know how I would have assembled them if I did not happen to have another chair to use as a model from a different manufacturer with a similar swivel mechanism.