These bases were designed for use with our Crystal Collapse game, and features set of 12 x 30mm diameter bases with a triangular "nose" to denote the front facing of the model and 4 studs around the base to help differentiate the front, sides and rear facing of the models (a critical feature of Crystal Collapse).
You can read more about Crystal Collapse at https://crystal-collapse.com where you can also download the rulebook for free.
