Most polyhedral RPG sets top out at 7 dice. One of each type you need for a standard game. The Eclipse 11 Dice Set adds four extra d6s on top of that (for a total of 4x D6, plus D4, D8, 2x D10, D12, and 2x D20), which matters if you're playing a system that leans on multiple d6 rolls at once rather than the usual single d20. Cast in acrylic with a shimmering finish, and it comes in Ultra PRO's own 2-piece storage case, sized to hold up to 40 dice if you want to add more later.