This is a gimmick deck that is no longer being made!
This deck enables you to do some really neat card tricks. You hand half the deck to a participant, keep half for yourself, The participant can choose any card from his half, and while your head is turned, place it into your half. You hold the cards to your forehead and immediately reveal the name of the inserted card. Works every time.
With a moderate amount of practice and skill, it is easily mastered. It is a very clever gimmick.