WoW Item Upgrades
The most commonly used term for item upgrades is "upping"--are items and enchantments that can be applied to weapons and armor pieces to boost their stats. These upgrade item components add a number of points to a level gauge for the Item Upgrader Kit, with the cost increasing with their rarity.
A perfectly rolled version of this armor is highly sought-after in the melee PvP community for its ability to limit weapon damage.
Type-restricted upgrades
The upgrading process is an essential aspect of the crafting process. Upgrades can be used to improve an item's stats or make it stronger, or even give it an added benefit. They can also alter the item upgrader mod's appearance. While certain upgrades are universal, others are governed by specific rules for applying to weapons or armor. Making the wrong upgrade item can ruin an otherwise excellent weapon, and could even lead to it becoming unusable.