Box of million things
Many people have these - a box that gold assorted things. Things that you might one day need, so they need to be stored somewhere. Just in case. In Finnish that's called miljoonalaatikko (literally a million box), a box of million things. Junk box I think it's called in English.
I might not have a million things in my box(es), but there is a lot of stuff in there. All sorts of pieces that might come handy in right kind of need. Especially as I often find myself tinkering with and hacking things to better suit my need.