Tool is an American rock band from Los Angeles. Formed in 1990, the group consists of vocalist Maynard James Keenan, guitarist Adam Jones, drummer Danny Carey and bassist Justin Chancellor, the latter of whom replaced founding member Paul D'Amour in 1995. Tool has won four Grammy Awards, performed worldwide tours, and produced albums topping the charts in several countries.

Maynard James Keenan is an American singer, songwriter, philanthropist, record producer, and winemaker. He is best known as the singer and primary lyricist of the rock bands Tool, A Perfect Circle, and Puscifer.