A American Avant-Garde Progressive [[Heavy Metal|Metal]] formed on 1990 on Los Angleles, California by Maynard James Keenan (Vocals), Adam Jones (Guitar), Danny Carey (Drums) and Paul D'Amour (Bass) who later was replaced by Justin Chancellor

The group is known for its experimental and existentialist approach in its songs, addressing themes such as spirituality, philosophy and social criticism.
tool (band)