This incredible little trick with a nut, bolt & tube. The nut is screwed halfway onto the bolt and dropped into a small plastic tube. The Magician now gives the tube a little shake and simply tips the contents out - to the audiences complete astonishment, the nut has not only unscrewed itself, but has penetrated right through the head of the bolt and rolls out of the tube separated from the bolt. Everything is immediately dropped into the spectators hand for thorough examination