These are the disks for the Dancing Dice & Dominoes Puzzle. These disks enable the tiles to twist and swap. This model contains all 21 disks you need for the 3x3 puzzle, They are wrapped by a shell to reduce the printing cost. It avoids the per part handling fees. You can destroy the shell when you receive the order.
To get the complete puzzle you then also need to order the tiles and frame.
See the description of the Dancing Dice & Dominoes Puzzle for details about the puzzle.