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World of Warcraft - Item Upgrading The upgrade option allows players to boost the gear rating of an item by up to 700 points and give it a bonus. Items can be upgraded if they are in your inventory and you bring them to the Kiln. Certain items are worth upgrading due to their distinctive stats. (For example, a perfectly roll breakpoint armor is used in melee PvP). Other items like weapons aren't changed much after an upgrade and aren't worth it. Weapons Upgrades to weapons can improve their numerical stats, including attack