Tool is an American alternative-metal band from Los Angeles, California.
Formed in 1990, the group's line-up includes drummer Danny Carey, guitarist Adam Jones, and vocalist Maynard James Keenan.
Since 1995, Justin Chancellor has been the band's bassist, replacing their original bassist Paul D'Amour.
Tool has won three Grammy Awards, performed worldwide tours, and produced albums topping the charts in several countries.