Skeleton Key

The Skeleton Key is a rare key obtained from the Treasure Hunter after completing the quest "Open Sesame".

The key can opens bronze and silver pirate chests, and have a 20% chance of breaking per use. If you have a corresponding key in your inventory when opening a chest (say bronze chest = bronze chest key), then the Skeleton Key will not be used. It should also be noted that this key will not open lockboxes, even if they are the corresponding color.

Use
Can open:
 * Bronze Pirate Chest
 * Silver Pirate Chest

Source

 * Treasure Hunter
 * Open Sesame (quest)

Trivia

 * Unlike some other desert island quests, the "Open Sesame" quest can be completed multiple times and more than one Skeleton Key can be acquired.
 * The Skeleton Key was crafted by a highly skilled blacksmith named Ealgar. The key is supposed to be of ancient origin as explained in Ealgar's Journal.