The magician shows two coins over a card. He puts the card over a glass and one coin goes thru the card. He takes the other coin and lets it fall over the card. The coin goes thru the card too. The magician takes the deck and lets both coins fall over the deck and the coins go thru the deck.
This is a product for magicians.
All magic tricks come with detailed instructions on how to perform the effect. Magic accessories (i.e. silks, foam products, balloons, thread, etc.) usually don't come with instructions unless otherwise noted.