Star Wars Edge of the Empire: RPG Dice - Rules of Play says:
The situations in which characters in Star Wars®: Edge of the Empire™ find themselves are rarely simple, but that doesn’t mean that you and your friends can’t figure out the best way to resolve them. Custom Star Wars®: Edge of the Empire™ Roleplay Dice come fourteen to a pack and allow players and GMs to quickly determine the success or failure of actions in the game, while advancing the story’s narrative with advantages and threats.