From the publisher's website:
From the weapons of the insidious dark elves to artifacts called down from outer space, this gorgeous play accessory collects all of the notable items from Pathfinder's Second Darkness Adventure Path! This 54-card set allows heroes to keep track of their equipment in style and is completely compatible with all of Paizo's other GameMastery Item Card sets. Each of these full-color cards features a beautiful portrait of the item on one side with space on the back to keep notes. GameMastery Item Cards are compatible with any fantasy roleplaying game.
Useable by experienced GMs and novices alike, this product fits perfectly into any Game Master's arsenal.