Creating a piece of equipment requires certain craft items to be used. Each piece of equipment requires four distinct craft items, which may differ in quality. Each item you craft grants you a certain probability of obtaining the gear item of a specific quality, depending on the materials used. The more used craft materials differ in quality, the lower your chances of crafting an item of the desired quality.

In the example below, you may see that using lower-quality materials drags your chances of crafting a high-level item down significantly. In this case, using these materials, you are 75% likely to craft an item of Epic quality while using three items of higher quality.