ThinkGeek Critical Hit LED Dice Set d10, d12, and d20 - Set of 3 Role Playing Dice that Flashes Red when you Roll a Crit FLASHES RED WHEN YOU ROLL A CRIT! - ThinkGeek Critical Hit LED Dice Set - d10, d12, and d20. A ThinkGeek creation & exclusive! NOT A CHEATER DIE IN THE BUNCH! - Set of 3 Die - Each one is weighted evenly so you have to earn those top rolls. Set includes one of each: d10, d12, and d20 Dimensions: d10: approx. 1.8" diameter d12: approx. 1.4" diameter d20: approx. 1.7" diameter EXPAND YOUR LIGHT-UP ROLLING JOY - Expand your light-up, rolling joy, we've created this Critical Hit LED Dice Set. Each set comes with a d10, d12, and d20, which all flash red when their highest number is rolled. IT'S AN OBSESSION - ThinkGeek is obsessed with creating and sharing unique and authentic product experiences that stimulate our fans' imaginations and fuel their geek core. Since 1999, ThinkGeek has been on a mission to create a world where everyone can embrace their inner geek and connect with one another. WORD OF WARNING - The Critical Hit LED Dice Set could be detrimental to your roleplaying existence. Not only will it make everyone want to use your dice, but it also might make you more popular in your gaming group. Also, it's not always desirable for every type of roll to have the highest number. For those instances, we apologize in advance for your Critical Hit LED Dice Set mocking you by flashing.