The Steel Tongue Drum was invented by Dennis Havlena, who created the first Steel Tongue Drum from an empty propane tank in 2007. Because of this first version of the Steel Tongue Drum, it is also called Tank Drum.
Therefore, Steel Tongue Drums are hollow bodies composed of two dome-like shapes. The top side has incised slots surrounding different sizes of tongues which generates several notes, the count of which differs in between the models of Steel Tongue Drums.