These are excellent wheels for their purpose. However, they are not metal as stated in the description. I bought these for a welding and cutting cart I'm building so I need metal wheels. Rubber or plastic can withstand heat or molten iron for a very long time. I installed them because I needed them on a cart today and I was in a bind. They work just like rubber wheels, but soon I'll have to find real metal wheels, which is what they should have been.