Review on Superior Swivel: Unbeatable Online Service and Quality by Brennan Buckley

I bought these casters because they fit nicely on the underside of the wooden 4x4 stand that several of my workbenches stand on. The roles are very light. I bought 24 but only installed 4 of them on my lightest bench and while the rubber wheels seem to roll smoothly, the quad bearings make a loud crunch with distinct clicks, pops and groans. The volume is amazing as the bench slides across my polished concrete floor with minimal resistance. If I could find a better way to mount the roller directly to the underside of a 4WD car I'd happily spend more to get a better solution, but this is the best I've found so far.