Expanded Shell (US Half Dollar, Heads) by Roy Kueppers
Four half dollars are examined by the audience and then held in the magician's left hand. The coins then travel, one coin at a time, from the left hand to the right hand!
In this package you will find a finely crafted Expanded U.S. Half Shell (Heads) produced by Roy Kueppers complete with instructions where you will learn the basics of using your new gimmick.
If you'd like further instruction, I recommend this tutorial.