The Gold Standard by David Regal

What is The Gold Standard? It is an 18k gold-plated tie tack or lapel pin that does something special with great economy: a card is returned to the deck, and an instant later it is seen impaled on your tie tack. You can pull on the card, and spin it on the post. Best of all, when you remove the card from the tie tack there is a hole in the card.
 
The card can be signed. The effect can be performed at any time in your act, with a deck in play. And it doesn’t have to be a playing card. The Gold Standard can just as easily cause a signed bill to become impaled, or a business card – imagine handing out your card only to discover it pierced by your tie tack. When you remove the card there’s a hole running through it, and you give that potential customer your business information with a permanent reminder of the effect he just witnessed.