CS2 Case Hardened Skin is one of the most popular skins in the game and has been around since Counter-Strike 2 was released in 2012. It is a unique pattern of blue and yellow, which is created by the case hardening process of the weapon’s metal surface. This skin is available on all weapon types, but is most commonly seen on knives.
The rarity of the Case Hardened Skin varies from weapon to weapon. The Karambit is the rarest of the knives with this skin, and is usually the most expensive. The Butterfly Knife is the second rarest, followed by the Bayonet and M9 Bayonet. The rarity of the Case Hardened Skin is determined by the pattern of the blue and yellow on the knife. The rarest patterns will have a lot of blue, while the more common patterns will have a lot of yellow.
Overall, the Case Hardened Skin is one of the most popular and sought after skins in CS2. It is available on all weapon types, but is most commonly seen on knives.