This set of 7 dice contains Arch'd4, d6, d8, d10, d%, d12, and d20.

Large High-Visibility Polyhedral Dice: Diffusion Amethyst

Sets of 7include the following dice in a display box:
Arch'd4, d6, d8, d10, d%, d12, Balance'd20.

TheArch'd4is a better alternative to the traditional d4; bigger, reads from the top face, easier to pick up, and easier to roll.

TheBalance'd20provides a more even distribution of results by ensuring all adjacent groups of 5 sides add to 52 or 53.