These chess piece toppers are the same as the other individual piece topper kit but comes with an extra queen (17 total pieces).
For an expanation of how these are intended to be used you can consult the 16 piece kit write up at the following
link:
https://www.shapeways.com/product/KLG9J9GAL/chess-piece-toppers-16?optionId=199760452&li=shops