In all my life I had some difficulties to eat some walnut, break the walnuts was something that almoust drove me crazy. The reason of this is the technicality that walnuts have, the shell, sometimes difficult to break.
We can break walnuts in various ways, we can break them with our foot, with the technique of breaking the walnuts in our hands pressing one against the other, throwing them against the wall or the floor, with our head when we are crazy, or finaly, using a nutcracker.
So, what´s my problem? You ask.
My problem is the difficulties that I have in break the walnuts even with the nutcracker, maybe because I don´t have the necessary strength, or all nutcracker I used until now were a crap. I´ve used the normal type, the hand´s technique, even with the nutcracker with the squirrel form that my mother bought I´ve had difficulties.
But now my life changed, I discovered the great nutcracker, the god of nutcracker. I´ve never seen something like this in my life, so easy, so smooth. Now I´m eating walnuts like I never did before. The most incredible thing in this story is the place that my girlfriend found out this nutcracker, in a skateshop, no no, in a kind of chinese dollar store.
The image below is from a nutcracker like mine.
this is not the kind of nutcraker you wanted? 
the nutcracker