Two card holders of similar style. One with a highback, one with a 'level' back.
This card holder fits a standard credit card.
I use it to hold all the spare membership cards, reward cards and VIP ards.
I have built a little divider between the two sections. On the back, Ive recessed holes for 'magnets. Its a pretty tight fit, and you will have to use a little CA glue or 5 minute epoxy.
I used rare earth magnets and have this stuck on the side of my fridge.
I used supports for the cutouts, haven't tried printing without.
Bit of a pain removing the supports but it is achievable.