Wallnut crusher

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The walnut crusher idea features two identical halves joined with a screw and nut. Constructed from soft rubber, plastic or wood, it boasts a conical inner shape to hold the walnut securely, while spherical shapes at top and bottom break the shell. With an inner volume smaller than the walnut's, usage is simple: insert the nut inside, close the other half, grip by handle, and strike on a table. Benefits include minimal walnut damage and shell retention.