Found this project a while back and have been contemplating doing it for a while. As I play poker quite regularly, I tend to go through a few decks of cards. I usually give the old "marked" decks away, but 2 decks have been lying around my place for a few months now. One of these decks ended up in the pool recently, so I decided that this was a good excuse to destroy the other.
"This is an 8-inch diameter construction in which the 30 cards have more overlap, so it is trickier to make. All the joints are 3-fold locks, so it holds together very tightly. You can throw this around a room and it will not come apart"