To penetrate the nut's hard protective shell, a metal vise or hammer can be used to compress the shell until it lightly fractures, then the pressure is released and the nut is repositioned to crack it along a different plane.
A metal vise or hammer can be used to compress the shell until it lightly fractures. This was to penetrate the nut's hard protective shell. Then the pressure is released. This was to penetrate the nut's hard protective shell. The nut is repositioned to crack it along a different plane. This was to penetrate the nut's hard protective shell.