The rarity of The Dwarf Engineer is Uncommon, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
The Dwarf Engineer is a skin for Sniper. The skin was added to the game on August 22, 2016, it was created by AstraZeroZak.
The Dwarf Engineer is currently one of the most popular skins, but it is rarely seen in the game due to its high price.