Which rock band is the American musician Maynard James Keenan a vocalist for that won three Grammy Awards, performed worldwide tours, and produced albums topping the charts in several countries?
Maynard James Keenan:  He is best known as the vocalist for the alternative rock bands Tool, A Perfect Circle, and Puscifer. Tool (band):  Tool has won three Grammy Awards, performed worldwide tours, and produced albums topping the charts in several countries.
Tool