This base is rated for 400 pounds. I bought it for my 285 pound Jet JPS-10TS table saw, and it is not at all solid holding this saw. It "bounces" and flexes - I expect a mobile base, when the wheels are locked, to be as solid as when the tool is sitting directly on the floor. This is not even close.I also found that the assembly instructions were difficult to figure out. I'm an engineer, so I'm no dummy at putting things together - I feel the instructions could definitely be improved.Overall, I'm very disappointed.