a 10' x 3' tool in the shed when I tried to drag it to the right corner I found these cute critters. I put six of them on a cabinet and remade the frame at the bottom so they can rotate and now the tool cabinet and I can dance around Texas. They are strong, don't wobble and stay in place. The cupboard was over two hundred pounds empty (too much I would say but others disagreed) and was extremely bulky in front of the reels. It's very flexible now, holds lots of heavy tools and a drill press, and moves smoothly where I need it.