NOT guitars for all.

I value not the product only highly misleading title.
First of all: There is no Capo which is good for all guitars as described in the product title.
Hoh? How come?
I'll try to explain it once so that it understand people,
want to start or want a / s guitarist / in a present:
There fingerboards with and without radius, that is some have a slight rounding,
some do not, please do not confuse the fretboard with the neck, the fingerboard is the part
mounted on the neck (the one with the many metal rods and mostly with dots on it).
Most (actually almost all) electric guitars and acoustic guitars (ie anything with metal strings)
be a fretboard radius have - Classical guitars (with bowel or nylon strings) just usually not.

Accordingly, there are also several capos - with flat rubber for classical guitars,
and with round rubber for anything.
Why does not it?
If you use a Capo for Western and Electric Guitars with a classical guitar,
not all the strings are usually pressed firmly down because of the radius in Capo,
and the absence of such on the fretboard.
So the 2 middle strings either do not make a sound to give unpleasant humming,
or just plain weird and "dull" sound.
Same with Classic capos on the west and electric guitars just with the outer strings.

Often the thicker strings of classical guitar are wound with silver,
and are sometimes confused by Schenk joyful relationship / friends with metal strings,
if the guitar has 2 large slots in the top plate (upper end of the guitar)
then it is usually a classic - if you are not sure ask help.
To show interest in the hobby of this gift to person usually comes anyway good,
so best just ask.
There are also special Capos for all "specific" types,
for guitars with 12 7 8 strings, etc etc, unfortunately makes all sense
and is necessary, as I said before - best to ask just stupid,
which is certainly better off than stupid.

I hope that's now a little clearer for non-players.
I apologize for the length, but better just as defective.
I also want to place short of 3 capos major manufacturers to heart,
which are there: Kyser, Shubb and G7th, which is preferred here is usually just more a matter of taste,
keep prices mostly in the context in which G7th but are slightly more expensive.
(Shubb and Kyser start at about 15 G7th cost around 25 to 30)
Google and forums help here at the decision.