One of the most deceptive devices in every magician's repertoire has always been the expanded shell coin. In the right hands, miracles can take place with this ingenious piece of apparatus. And these shells by Johnson Products are unequaled anywhere in the world. Dozens of effects are possible with this basic magician's tool. Included is a Coins thru the Table routine. From Johnson Products. This is the one Michael Ammar uses for Shadow Coins. Half dollar size.