I had a very heavy wooden filing cabinet that was HARD to move. In the end I decided to dump it, turn it on its side, chop off the thick strong legs and attach these wheels instead. You are perfect. The clear wheel leaves no marks on my new floor and they are all fixed so after delivery it stays in place and can be rolled with two fingers! Talk about smart! They weren't expensive, they were easy to install. I had to drill starting holes in wood and then screwed 4 screws into each wheel. Thanks for a great product. I would give it a six if I could. :)