I have a small metal shelf with round feet that I wanted to replace with casters. The threaded post on the feet seemed to be the same size as the post on these casters, but the threading was actually slightly different, so I couldn't screw them in farther than a few turns. Luckily the casters came with thread sprockets (which wasn't in the description, so it's hard to say if that will always be the case, depending on who fulfills the order). So, once I was able to remove the existing thread sprockets (which was a bit of a challenge!), everything fit together as needed.The other issue was that this set didn't come with a wrench tool, and without one you can't really get any leverage on the caster to tighten it fully. I had several of these things lying around from various other furniture assembly projects, and thankfully one of them was a good fit. I wouldn't have been able to tighten the casters without this.Now that they're installed, the casters seem very smooth, quiet and sturdy. I suspect they will last longer than the metal shelf I put them on! :D

Suitable but not perfect will not screw on entirely

These appear to be really well made casters and arrived quickly. Only issue I had with them was the description of the width of the stem. For US buyers it would be helpful to have the stems measured in 8ths or 16ths of an inch rather than M6. Otherwise these are really nice.

i used it to replace plastic casters on a plant stand. it should function better and lst much longer

These glide shockingly well for how tiny they are. Exactly what I needed. I'm considering buying more to replace my junky ones from Home Depot that don't roll.

I bought these to go with a wire rack that had terrible plastic wheels. The pin size was small these were the only ones I could find that would fit. They are tiny but pretty sturdy. I wish they came with a small wrench you could use to tighten but overall they fit are decent so I made them work.