Review on Coocheer 360 Degree Swivel Caster Wheels by Fritz Wiest

I bought these for a welding carriage I was building. They are *much* cheaper than anything I could find locally. However, they don't feel cheap and the plastic wheels are very good. My only complaint is that the roller bearings in the pivot aren't the best. 1 out of 4 reels has a spot where it doesn't like spinning like there was already some abrasive or shmoo in the bearing ring. It's unsealed of course, so it will happen over time, but I didn't expect it to be so out of the box. The carriage they're attached to is fairly light, but if they're on anything near capacity you might have trouble turning if you have bad caster.