Punch'd (Gimmicks and Online Instructions) by David Michael Fox
The PUNCH'd device allows you to mark cards and gaff borrowed decks in a fool-proof way. Your spectator can name any card or group of cards and you can now mark those cards right in front of their eyes without them ever realizing it. They can then shuffle the deck to their hearts desire but you will always be able to find their card or group of cards.
The Other Brothers & David Michael Fox provide OVER AN HOUR of instructional material covering everything from close-up & parlor routines utilizing cards & classic mentalism effects using the PUNCH'd gimmick.
PUNCH'd is a real-time, tactile marking system that allows you to start with a borrowed, shuffled deck and end with an undetectable cheating deck! Similar devices in the past have been expensive, difficult to get, impossible to hide, requiring set up ahead of time, or simply too singular in application. PUNCH'd has been carefully designed to be small, portable, easy to hide, and ultra-lightweight while providing the ability to perform incredibly fooling mentalism effects at a moment's notice! Not only is PUNCH'd perfect for card magic, you can use the PUNCH'd gimmick for a variety of effects from close-up card magic, to cheating, to full out parlor and stage mentalism with NO preparation.
Get all the benefits of a gaffed deck but with a fully examinable, completely borrowed deck of cards which can be handed right back to the spectator without them ever discovering your mark. Because it disappeared. Like magic.