Butterfly Knife | Case Hardened (BFK CH) was added to the game on July 1, 2014, alongside the start of Operation Breakout. The skin is available in the Operation Breakout Weapon Case.
The hardened blade of the knife is covered with blue, violet, and yellow stains. The handle is unpainted and complemented with inserts made of hardened steel.
The skin is available in all conditions, and its Float Value is unlimited. Traces of wear such as scratches and abrasions do not appear on the knife even at the highest Float Values. At levels of wear close to the maximum, the blade is coated with a layer of patina and looks significantly darker.
The pattern index affects the location, color, and shape of the stains. The pattern variations with a predominance of clean blue stains on the play side (“Blue Gem”) are considered to be the rarest and the most expensive ones. The cheapest and the most common pattern variations are those with yellow blades or yellow blades with inclusions of blue covering up to 30% of the blade surface.
The quality of Butterfly Knife | Case Hardened is Covert. The skin has a StatTrak option and belongs to the "Case Hardened" series.
Butterfly Knife | Case Hardened is currently a rather popular skin, which is often seen in the game.