These dollys feel sturdy, but there are a host of flaws that would dissuade me from purchasing these a second time.First, these flake paint like crazy. You barely have to touch them with bare hands. I haven't even finished assembly and I am doing so over a trash can to catch all the flaking paint.Second, these appear to be paint dipped, because the caster threads are filled with paint, making threading the wheels difficult. I have had good results running the wheels through from the opposite side first, then removing and running through the bottom. What would be really helpful is if a flat 17mm wrench was included as well as the flat 19mm? wrench for the nuts that is included.Lastly, some of the nuts that the wheels are welded on to secure the wheels are welded on crookedly, making it impossible to secure the wheel with a nut after installation.Bottom line: If you just want some cheap, solid cabinet dollys, and you don't mind struggling with assembly issues or flaking paint, this is the perfect product for you. Otherwise, turn back.