Tool is an American rock band. It was formed in 1990 in Los Angeles, California. The band took a break before and after their third album "Lateralus" because singer Maynard James Keenan was working with his other band, A Perfect Circle, at the same time. The band has won Grammy Awards for Best Metal Performance in 1997 for the song "Ænema" and in 2001 for the song "Schism". Tool has four members in the band: Danny Carey, Justin Chancellor, Adam Jones, and Maynard James Keenan.