I've bought wheels from a few shops and I couldn't bring myself to pay the prices they were asking for decent wheels. At TSC, a comparable wheel (in the singular) costs about the same as this complete set. This was also fairly typical of other obvious box stores. After that I was a bit surprised by the quality of this set. It will easily cope with a table I built and installed and a load of 300 Bl, which I think will be about the maximum. The grade 4 I've given to the blocking feature is only because I've seen some that are slightly better, but these are typical designs and there's nothing wrong with that. Note: I've posted a review about it before, but Revain keeps pushing me to review it, so there might be another review of mine below somewhere. I hope this review will suffice for you.