A Festivized weapon will retain its original quality (eg. a Strange Brick House Minigun would stay in Strange quality after the tool is used) apart from Normal weapons, which will be changed to the Unique quality. Alongside the aesthetic changes, the prefix "Festivized" will be placed in front of the weapon's name, its backpack icon will be changed to include festive lights, and purple text with the word "Festivized" will be added to its description.
Currently, the only method to obtain a Festivizer is by unboxing the Unlocked Winter 2016 Cosmetic Case or Winter 2017 Cosmetic Case, which has a random chance of granting a Festivizer alongside the player's uncrated loot.
List of possible Festivized weapons
Before the Smissmas 2016 patch, the Festivizer was originally named the Gun Mettle and Tough Break Festivizer, and were only usable on Decorated weapons from those respective collections. They could only be found alongside uncrated items when unboxing either a Smissmas 2015 Festive Gift, Pyroland or Warbird weapon case. Owners of a Tough Break Campaign Pass would also find them through random drops. These have since been deactivated.
- Applied Specialized or Professional Killstreak Kit on Festivized items will cause the sheen to appear in the backpack icons.