Here is the effect and it happens just as it says:A pack of cards is divided into reds and blacks. The performer introduces a plain board tray in which a well has been cut just large enough to hold the cards. Into this well the magician asks a spectator to place the red half of the pack. He explains that he uses the board in order to prevent any suspicion of the conjuror manipulating the cars. There is a little indentation on the board which allows a knife blade to be inserted between the cards. Three or more of the spectators insert the knife blade , raise the pack, and withdraw either the top card or the one below it. (their choice) and then remove the card. Cards are collected by spectator and placed back in the pack (they may be signed). Now a spectator who has been holding the black pack is given the red pack and the black pack placed in the well. Without the performer touching the cards and at his word of command the signed cards fly from the red pack to the black pack. Both packs may now be thoroughly examined! The not so innocent tray makes this easy to perform.
Comes with instructions in very good condition.