Oldie but Goodie

Leatherman Serac S3

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For some reason they sell for more today used than they did new 20 years ago.

I dont think those are available anymore

another CR123 size oldie but goodie, also made of unobtanium:
Nitecore EX11.2

Good lights. I really like the 123 form factor. Yes I use primary cells. I have TK16 and wife has couple SR mini something.