It's Magic: Secret Marked Cards

With this deck you can read what the cards are from the backs but cards look normal. Many tricks are possible.

Regulation size plastic coated playing cards. Looks like a regular deck, but back of cards are secretly marked with markings detectable only by the operator.

Complete instructions explain how to tell any card in the deck and perform dozens of mystifying card tricks. Also, methods of "knowing cards" without seeing them.

You would normally pay twice as much for this trick deck of cards!