It can be used to gain double the amount of logs cut with no experience gained or it can be used to double the amount of experience with no logs gained. It lasts for 100 charges, only consuming a charge upon success of an action. If the item is used with an augmented dragon hatchet or augmented crystal hatchet, the dwarven tool will take priority, and the other item will be ignored in terms of charge drain, perk, and item experience gain.