We bought three and they are horrible- they were good for the first 2 months. You need to tighten the hardware every month. The washers are not a quality lock washer so everything loosens every month. Now the hardware to keep the seat together is falling apart which was performed in Vietnam or china, wherever they came from.,  They are nice if you don't use them. They aren't very comfortable either. going to have to throw them out now. The loose seat hardware and connection to swivel just make them unsafe. The picture shows the chair on it's side from underneath. I'm trying to repair it for the 4th time since October 15 2019 when we purchased.