• A thief's key in a player's inventory
  • A thief's key on the ground

The thief's key is used to open the locked door in the rogue den. It will sometimes drop from any thief found within the den, but not inside the thieves area of the den. The thief's key will break after a few uses. Sholop buys thief's keys for 14 gold and sells them for 50.