These were ordered to replace my almost deteriorated wheels on my office chair. I had the hard plastic wheels that came with the chair for a LONG time and use my chair on a concrete floor finished with paint and epoxy. I spend a lot of working hours in the chair and have been using it with these wheels for about 4 or 5 months now. They glide so smoothly and are holding up really well. I definitely recommend, in fact I wish I had ordered them long ago!