Extraction utilises Extraction Tools to obtain Enchantment Stones, used for enhancing equipment.
How to Extract[]
One set of 
<Extraction Tools> is used per extraction. In order to extract, Right-Click on the Extraction Tools then Left-Click on the item you wish to extract from.
You may only extract from items that can be enhanced. These are your chest, legs, shoulders, hands, shoes, primary weapon, and secondary weapon. When you extract from an item, that item is destroyed. Do not extract from items you wish to keep or use.