Steal

Steal attempts to "steal" an item from the targeted monster. Only items dropped by the monster can be stolen. A successful attempt will not affect what is dropped when the monster dies. After success, it is not possible to Steal again from the same monster. Boss-protocol monsters cannot be stolen from.

The formula for Stealing is believed to be: "AdjustedDropRatio = DropRatio*(DEX + 3*Skill level - MonsterDEX + 10)/100"
 * DropRatio is the percent chance of a particular item being dropped. If the result of the Steal check is lower than the AdjustedDropRatio for an item, then it is possible that item will be stolen.