Foldable card holder (for up to 4 cards)

This card holder has space for up to 4 cards. 
The hinge makes it foldable so it is not much bigger than the original design and a regular card holder.

I needed this design because 2 of my 3 work cards have RFID chips that infere with each other so that the doors do not open when place on the reader. Now i can open the holder, place the respective part to the reader and snap the holder back up.

The two little hooks can be inserted into the slots on the half with the loop for the lanyard. To make it a secure fit, you can heat the end with a lighter and squish the plastic (last pic). Otherwise they will protrude or fall out.