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World of Warcraft - Item Upgrading Upgrades to items allow players to increase the gear score of an item up to 700 and also add an additional perk. Items can be upgraded if they're in your inventory and you decide to take them to the Kiln. Certain items can be upgraded to increase their stats (like perfect rolled breakpoint armour used in melee PvP) and others, like weapons, do not change significantly after an upgrade and thus aren't worth upgrading. Weapons Weapons can be upgraded to boost their numeric stats, such as damage to attack, crit chance