Sturdy, heavy. The instructions are ok to give (even) some ideas on how to use it, helpful for the novice user. Quality control of some sockets could be better. When I got the set back with one missing I needed to be sure what it was so I measured each one. Very few were "accurate" to the dimensions given in the manual, by several thousand. I guess it doesn't matter in the scheme of things, but that's what I found. If necessary, many machine shops, or anyone with access to a metal lathe, should be able to "finish" it as needed. Your support could be better as I'm having trouble finding a contact to order a missing socket. NEVER borrow your tools.