Alexander DeCovas's Add-X card shelf is a clever device which enables you to vanish, produce or switch objects right under your spectator's noses. Just one of the many possible uses: a playing card is signed and returned to the deck. Vanish it instantly without palming, clips, or body loads. As fast as it disappeared, it can be produced from another deck of contrasting color or from inside a sealed envelope. Your hands are seen completely empty from start to finish even at close quarters. And the card can even be seen inside the envelope before it’s dropped out. Add-X will enable you to perform hundreds of different effects. Mastery of this revolutionary device is easier than you think. Includes video.