Extractor (DN)  

Dragon Nest Wikibase™ Guides

Extracting produces Comet Dust and Geodes which are used in Enhancing.

The odds of getting items out improves dramatically if you use all four slots and all four items are Magic or better and of +7 rank or higher. Chances increase exponentially above +7. If the item is rare (blue) or lower and is not enhanced to at least +6 you may as well not even bother, as your chances of getting anything are too low.