As it is slim type, we can receive the number of sheets more than standard type in the same space.
It is hard to be broken
It is Blu-ray/DVD/CD case which adopted flexible PP material resisting breaking.
One piece of storing
We can store one piece of disk because of one piece of case.
We can store the lyrics card
The lyrics card and index card are packable in the case inside, too.
Five colors of a packs to sort are sets
It is a type to sort that five colors of colors packed.