Very cheaply made. I bought four of these stool casters to be used by a 126 lb doctor. The rollers started losing bearings after 1 month of use. The doctor only comes to this practice twice a week for 5 hours each time and does not sit in a chair all the time. Do the math. The rollers broke after less than 40 hours of use. When I called the company they said there was nothing they could do. I do not recommend buying these reels nor do I recommend doing business with Shepherd Hardware.