I converted my workbench to 4 corner legs with spacers and used this set of 4 leveling casters. I figured I would just put my workbench in one spot and level it with the legs with the wheels up. But so far I've taken the opportunity to turn the workbench around a bit. They are valued at 110 pounds each, for a total of 440 pounds. My workbench is heavy and I bet there's a reasonable amount of stuff on it while I'm working I'm not that far from that number. But I have to believe the estimate is for the wheels, and with the feet set to the ground they can support over 110 pounds each. One of my biggest pluses is that I couldn't find anything like a leveling foot in stores. Lots of roles but no leveling function. The only drawback so far is that one of the wheels has a flat spot. So when I roll the workbench, it knocks. Was going to complain and maybe try an exchange but haven't found it to be too much of a problem so far. In general very satisfied.