I have been using a 2x4 under one leg of my table for years. I was afraid to buy on line in case they didn't fit. So I took the plunge and they were a good fit. A tad loose but that was me. and they stay put so I am happy as it looks better than the 2x4.
After searching everywhere, these casters were a perfect replacement casters for an antique bookcase.
I bought these after looking for a very long time for replacements for my coffee tables old casters. The information online was so detailed that I was confident of the fit. The casters also came with adapter sleeves for an even better fit. I'm extremely pleased with these and that I finally have my beautiful coffee table in one piece again.