MiniCard Holder with 608 Ball Bearing (for "MOO" cards)

This is a nifty card holder for the popular [MOO](http://moo.com/)-style [MiniCards](http://us.moo.com/products/minicards.html), inspired by the [official MOO MiniCard holder](http://us.moo.com/accessories/moo-minicard-holder.html). You can open it, push out a card, and click it closed all with a single hand. Watch the [video](https://www.youtube.com/watch?v=7hcrcbVhc2k).

It can hold up to twenty "classic" MiniCards (the official card holder holds only twelve), but it can be adjusted to hol