This set comes in the 8 piece poly set needed for D&D and other RPG systems: a 2d20's for advantage, a d12, a d10, a d8, a d6, a d4, and a percentile die in a custom-crafted metal storage tin complete with heavy-duty protective foam to keep them safe when not battling evil! Heat treated numbering gives each and every dice a unique look, with no 2 sets being the same, whilst providing perfect readability from across the table. Unlike regular dice, this metal set is die-cast in zinc allowing these solid metal polyhedral tumble across the table unnerved by anything crossing their path. It's also why we recommend getting a dice tray with them!