THIS VIDEO DEMO IS FROM THE MANUFACTURER:
Sturdy metal cover for a deck of cards. Keeps wear and tear to a minimum! Excellent if you tend to keep your decks in your pockets. Just slip the deck into this protective silver-gray case.
Some magicians have their Card Guard engraved with their name, a rather elegant touch. You could even have the name of a card engraved, and use it as the end of a trick (as in "Is THIS your card??"). Many shopping malls have an engraving store like Things Remembered located in a center kiosk, or you could inquire about engraving services at any jewelry store.