Probe Pick Set
The Probe Pick Set is one of my favorite tool sets because I've been able to use it for so many tasks.
Naturally, it's steel so you'd need to be using it when you know you can.
A fantastic mechanical block for purely mechanical switches...hand grenades, mechanical clocks, etc.
I've used them to scrape carbon while cleaning my M4, hold a line in place by sticking these in the ground, starting a pilot hole and getting popcorn husks out of my teeth.
Get this all purpose tool to make your life easier when you least expect it.