Schism is a song by American progressive metal band Tool, released on their 2001 album Lateralus and known for its complex time signatures and shifting guitar patterns. The opening strings became one of the track's most recognisable moments, often shared on their own by fans who wanted a short, instantly identifiable Tool clip. On soundboards and as a ringtone, the six-second start works without vocals or context, which helped it circulate beyond the full song. It remains popular because it captures Tool's technical, brooding style in a single brief passage.