Spiked Coin (Royal Magic)......$3.75

The magician places a half dollar (or the plastic coin supplied) inside
a solidly constructed plastic box, puts on the lid, and then proceeds to
push eight solid plastic spikes completely through the box, and
apparently right through the coin as well.  They see the each spike
enter the hole at the top of the box and emerge out through the bottom
hole of the box.  When initially placed into the box the spectators can
plainly see that the coin takes up the entire bottom area of the box
with no room to spare.  There is no way that the spikes can be placed
around the coin, so they must penetrate through it.  To finish, the eight
spikes are removed from the box and the lid is removed.  There
resting on the very bottom is the coin completely unharmed.  

Very easy to do.  Supplied with the box, lid, spikes, and instructions.
Color of the box and spikes you receive may be different from that
pictured.