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It's this gadget.

I carry a P-38 on my keychain, a Leatherman Wave on my belt, and a cheap pocket knife. I'm pretty well set for tools, but I really need The Doctor's sonic screwdriver to complete my EDC loadout.

Oh nice tool!
If you visit Switzerland you should buy a Victorinox Swiss Army knife ;-)

https://www.victorinox.com/ch/en/Products/Swiss-Army-Knives/c/SAK

SAK_1_6795_XAVT__B1.jpg

There is also this cool card ;-)
SAK_0_7100_T__S3.jpg

I have an authentic Victorinox Swiss Army Knife. I don't tend to use it, though. The Leatherman is bulkier and heavier, but I use the core pliers frequently. My current pocket knives is a spring-assisted flipper, and that is far more convenient fornone-hand operation. That's not to say the Swiss Army Knife isn't a key part of my emergency kit or camping gear loadout, though.