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World of Warcraft - Item Upgrading The upgrade of an item lets players increase an item's gear rating up to 700 points and add a bonus. Items can be upgraded if they're in your inventory and you bring them to the kiln. Certain items can be upgraded for their unique stats (like an ideally made breakpoint armour that can be rolled to use in melee PvP) while other items, such as weapons do not change significantly after an upgrade, and therefore aren't worth upgrading. Weapons Weapons can be upgraded to improve their numeric stats, such as crit cha