Knife Victorinox 0.6123
We are used to the fact that key chains are funny trinkets that we hang on the keys. Victorinox has its own view on this matter.
They made this "keychain" not only bright - which is convenient when looking for a bunch of keys, but also very useful.
They transformed it into a knife, added a nail file-screwdriver. And they added all this with a toothpick and tweezers.
Now the most necessary tools are always at hand.