Once more to the Victorinox Compact:
It has attached what is needed for trekking and traveling, not more, not less.
It's simply perfect. And relatively light and thin!
For a weekend the cheap but very sharp Opinels are ok, because I don't have to cut my finger and food nails and can survive without the comfort a Victorinox Compact gives me.
The fix blade knives I take with me additional to the swiss knife in cold and very whet conditions.
The Opinel I have in the kitchen bag for car camping, my brother has it in the pocket for daily use, and the swiss in the Landrover, which is always with him. There in he has saw, axe and hatchet too, and so he doesn't need a full tang knife.
The Opinel No 7 he uses was constructed as a farmer's knife, like the Defender as a farmer's car.
My brother is a farmer and prefers them both. But he uses the Opinel for trekking too.
By the way:
Victorinox sells folding scissors for nail cutting too, just folding scissors.
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They are expensive and I would be afraid to loose them. My Swiss knife is attached with a rope to my belt. That I can't loose!