Connectable card holders

I made a simple card holder for my board games. The card holder has small protrusions and holes that allow several card holders to be linked together, useful for games like Eldritch Horror. The card holders are approx 61x95 mm on the inside, allowing for sleeved cards to fit nicely. Suitable for all Fantasy Flight games, Monster Mayhem, and so on. I've printed these in PLA, with 15% infill. To avoid warping I print two together with the connecting pins facing inward.