What's more metal than a robotic band actually made out of heavy metal?

Compressorhead were created by Kernschrottrobots and describe themselves as the "world's heaviest metal band".

With 78 hydraulic fingers between them, including a drummer known as Stickboy with four arms and double bass-drum-kicking feet, the band are currently on your around Australia.

Among their covers are AC/DC, Black Sabbath and Led Zeppelin tunes.

Currently they don't play their own material, but clearly it's only a matter of time.