Machine Head is an American heavy metal band from Oakland, California. The band was formed in 1991 by vocalist/guitarist Robb Flynn and bassist Adam Duce. The band's aggressive musicianship made it one of the pioneering bands in the new wave of American heavy metal, and they are also considered to be part of the second wave of thrash metal bands from the 1990s. Machine Head's current lineup comprises Flynn, bassist Jared MacEachern, guitarist Wacław Kiełtyka and drummer Matt Alston. Duce, guitarists Logan Mader, Ahrue Luster and Phil Demmel, and drummers Tony Costanza, Chris Kontos and Dave McClain are former members of the band; Mader and Kontos toured with the band in 2019 and 2020 as part of the 25th anniversary tour for its first album, "Burn My Eyes" (1994).