This is a single US Dollar size (1.5-inches in diameter) silver/black Chinese coin shell with milled edges. The expanded shell will fit over any US Dollar size coin.

It also incorporates the Tom Gagnon idea of having the inside of the shell match the outside so you can flash both sides when the shell is empty.

Manufactured by Joker Magic. The shells and matching coins are no longer available, these are the end of them. No instructions.