Mends any dia/netherite tool (+sheers), weapon, or Elytra and makes them UNBREAKABLE. This reward CANNOT be applied to armor! If applied to an item which has had its Unbreaking level increased via the Gear Hardening Service reward, the Gear Hardening reward books will be returned to you.
All reward books will be delivered to your in-game reward archive (/rewardarchive). All reward books in your reward archive at the time of a map reset will carry over to the new map. Once a reward book has been used in game to redeem the reward that book is consumed.