I have a lot of, and had a whole lot more, knives pass through my hands. I have two that I refuse to be without. One is the little Swiss Army Classic SD 7 (scissors/blade/file/toothpeick). I keep them in places much like I do reading glasses!
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Can't keep up with this thread and missed the significance of this model designation on the SAKs.
The SD 7 is what I was calling the "executive." Not sure where I got that name, but one of those is in my pocket at ALL times. I got each of my daughters and my wife the Alox (not bullet lube) versions with the slim, checkered scales anodized in a wide array of girly (and some manly) colors.
This is one of the most eminently useful knives I've owned. The main blade is good for a lot of things and takes a very good edge, but doesn't hold it particularly well. Aside from that, the file works and has not worn out (diamond-file), the screwdriver is the best staple-puller (for paper) I've owned and helps break knots that have been left too long, the scissors WORK, work well and are easy to handle, even though tiny, the tweezers in the handle are super handy to have and WORK, but I've not found a real use for the toothpick, yet I fuss about making sure I don't lose it.
I've meant to buy half a dozen more some time, but keep forgetting. Having one of these in every pack or bag will go unnoticed, weight and bulk-wise and t hey are just SO useful.