These are dice in the shape of chess pieces. They have polygonal bases with the requisite number of sides and so when they land on their sides, one result will face upward.This product includes half a complete chess set (order two of these, one in white and one in black to get an entire chess set). These can be used as chess pieces or as polyhedral dice to play a variety of games. When used as dice they are rolled longways (like Long Dice ) to generate a result. Also available as a standard 6-piece RPG dice set (with decader sold separately).This set includes:These pieces (and some others, such as a d4 pawn ) are available separately, as a 6 die set, and as a 7 die set in the Chess Dice section of my Shapeways Shop