Update: Now they are all separate as they are unusable ----! Keep looking if you don't want to waste money and time and enjoy disappointments! The bankers chair has had casters for six weeks now and two of the wheels broke in half and fell off. The inserted rod is still in the chair. The wheels themselves were spongy to begin with, but I've read positive reviews and found them ok. Two of them broke in the last few days - I don't know why - so the "they will recover" reasoning is wrong! This is a disappointment I didn't need, who needs it?!