"Fred" wrote in message
...
But just cracking the shell isnt enough with some nuts like walnuts.

I have often wonder how the hell walnuts are cracked commercially without
breaking the kernel into several pieces as it is being taken out of the
stiff membrane that covers it at the seam in the two halves of the shell. I
presume a machine (and not an army of low-paid people) *is* used.