They're not heavy duty, and they're not trivially easy to assemble and set up. However, if you are a person (probably a guy but not necessarily) who is going to use this sort of thing, you're definitely handy enough to stick the little bins onto the little wires.These are great. Though I use them for nuts and bolts and nails and screwdriver bit inserts, they'd work nicely for notions and spools of thread.I'm very happy with these. It was a pleasure "puttering around" in the garage, hanging and filling them up.For one thing they make a handier and nicer receptacle for "stuff" than the tin cans and plastic and glass jars folks (and I) typically have used. It was nice emptying out my tool cabinet and shelves of those things.And these are so cheap that you can separate stuff quite nicely. For example I have about 10 bins of various sized nails now; any time I want just one or a few nails, I just grab 'em.