A solid coin routine by Steve Dacri. Also includes thirteen additional ideas with micro-pennies by Sid Lorraine.
The effect as described in the booklet: Magician borrows a nickel, places it in his palm, and closes his hand into a fist for a split second. His other hand never comes near it. Yet when the hand is opened, the nickel is gone and in its place is a jumbo penny. Hand is otherwise empty. Penny can be examined. It is now placed in magi's hand again, and made into a fist to squeeze it back to the nickel. Hand is opened, and instead of the nickel, out trickles five micro-pennies.