From the release:
Test your luck against the Ancient Ones with Arkham Horror Dice, now available at your local retailer and on our webstore! These tools of cosmic terror replace or supplement the dice found in the Arkham Horror base game.
The standard Arkham Horror Dice, now back in stock, are attractive and highly detailed six-sided dice cast from hand-carved originals. They feature sculpted number faces as well as Elder Signs on the "5" and "6" sides indicating successes. Order yours today, and arm yourself against the horror of the Ancient Ones.