★ Butterfly Knife | Case Hardened appeared in the CS:GO shooter on July 1, 2014. It is contained in the Operation Breakout Weapon Case as one of the 13 knife finishes, which are rare special items for this case. The skin appeared in the shooter with the mentioned operation.

The skin showcases an intricate pattern characterized by an array of multicolored stains that have formed on the blade and handle inserts as a result of the case-hardening process. Areas of different colors are adjacent to each other, creating a variety of combinations.

The pattern index determines how the stains are distributed on the painted surface and which colors prevail. The most valuable versions are ones with a prevalence of pure blue areas (“Blue Gem”) on the play side of the knife. The most modestly priced versions are the all-yellow ones, as well as those with minor blue areas occupying less than 30% of the blade area.

Float Value of the item can vary between 0.00 and 1.00, allowing it to be obtainable in any exterior quality category. As the knife’s quality deteriorates, it becomes noticeably darker, and its surface becomes covered with patina. Because of all this, the multicolored pattern on the blade becomes difficult to distinguish when the knife’s exterior quality is “Battle-Scarred.”

★ Butterfly Knife | Case Hardened is categorized as the “Covert” rarity and has versions with the StatTrak kill counter. It is popular among CS:GO players.