Yeah. I’ve had a leatherman squirt on my key ring for years. It’s always in the same place, has a useful set of tools and has got me and quite a few others out of some minor scrapes
I've carried many different knives, and the one I stick with now is an opinel no 8. I find that I use it more than any other one, because it's particularly well suited to food. Perfect size to cut an Apple or avocado, even a steak, and the wood handle and general look make it pretty non threatening.