Glassjaw (sometimes stylized glassJAw or GlassJAw) is a four-piece post-hardcore band from Long Island, New York. The band is fronted by vocalist Daryl Palumbo and guitarist Justin Beck, and have undergone numerous line-up changes since their inception. The band has been influential in the progression of the underground music scene in the eastern United States and United Kingdom and on the post-hardcore genre (often being referred to as "legends" and even "kings"), and are known for their intense live shows and constant line-up changes. Fans have been waiting for their third full-length release for seven years.