It is used for journalizing fine electronic parts such as resistors and capacitors. Put the parts in the bag with the chuck and put it in the holder's pocket (originally for business card). It is better to take out space than planar journals and make it easy to take out.
I purchased it with a business card holder, so I have not used it yet. Because it is the same cardboard holder as the business card holder, there are few notches in the part to put in the business card, there are parts where business cards are difficult. There are differentiation points for prevention of shrinkage, but I have never been conscious of it even with the type so far, so I do not have any particular impressions.
I bought this because Kokuyo's business card file was full. It is perfect as standards are the same. It is not good to have a brown color, but the ease of inserting seems to be higher than Kokuyo this way.