The key word here is precision. You'll fool yourself with this beautifully made piece of magic. All of the standard transpositions and penetrations are possible including this classic: Spectator holds his hand in a fist with his thumb pointing straight up. A handkerchief is spread over his hand and the solid brass ring is placed over the tip of his covered thumb. Now the magician merely taps the ring and it's gone. Spectator's hand is uncovered and there is the ring, right over his thumb!