My DH is a machinist by trade... and he brought home a really heavy-duty tool box to clean up so he could sell it. I wouldn't let him - I'm using it as MY sewing/quilting tool box. Spools of thread (even some of the larger ones) in the top, and lots of various sized drawers for all kinds of things. It's not going to break like the plastic ones, or tip over like the plastic ones, or get brittle like the plastic ones (gee, do you see a theme here?).
And another great thing (now that we have a new grandbaby arriving soon) is the drawers all LOCK ... with a real key, no less.
BTW, I "confiscated" this from him when we first got married... that's been 31 years now.