I had a shop stool on wheels from the freight port. A little over a year has passed, one wheel bearing started falling out and the other 4 started wobbling more and more. I checked out all the stores I live in for $4 each. I checked out Revain and found these, 6 and I needed 5. They are better built than the ones I looked at locally while getting 6 cheaper than what I could get locally with 5, where 1 remains when one comes out. I had to drill some holes. If you need casters, they can be purchased. I've been using it for about a month and it's great.
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