It’s not a tool. But it is.
Get to know your hardware store. Wander the aisles. Learn what they carry. What the possibilities are. Get to know the people there. If you are fortunate enough to live nearby more than one, do this for all of them. Decide which one you like best, of course. But don’t dismiss the other ones. They may each have oddball items. Or oddball employees.
Because it’s much better and easier to have seen the right-handed metric framistat nipples a few weeks ago and know that such a thing exists, where to find one, and what it looks like. So when your framistat is suddenly out of whack, you know the parts to fix it exist, where to get said parts, and so on. And when you go buy that framistat nipple, you will maybe know to ask the grizzled old guy who works in the framistat area of the hardware store for any tips he might have on adjusting them. He probably knows his way around a framistat. And that conversation will go better and deeper if it starts with you and he greeting each other familiarly, rather than as this person who’s never been in my store before.
And besides, it’s a lot of fun to wander around a hardware store.