These heavy duty polyhedral dice are made of SOLID metal, yes, they are literally, Heavy. Metal. Dice. This set is Whether you're rolling for the win or chucking them at a kobold to defend your party these dice are right for the job. Just don't really throw them. They're heavy...They hurt. Made of strong Aluminum-Zinc Alloy. Comes in a collectible storage tin with foam compartments for each dice.