Paul D'Amour is an American musician and was the first bassist for Tool. His bass sound is recognized by the aggressive picked tone he developed with his Chris Squire Signature Rickenbacker 4001CS, which can be heard on Tool's first full-length album, Undertow. Since March 2019, he has been the bassist for industrial metal band Ministry.

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.