The AK-47 Case Hardened is a CS:GO skin from The Arms Deal Collection and was introduced on 14 August 2013. It has a float range of 0.00 through 1.00 making it available in all wear conditions. The Case Hardened skin uses a patina finish.
The pattern index impacts the appearance of this skin. The pattern that appears on the skin is determined in a "cookie cutter" fashion from an existing template consisting of a goldish-coloured base-plate with blue highlights. As a result, each pattern index has an entirely unique appearance.
These pattern indexes are split into four groups: Blue, Gold, Purple and Silver.