Just as grunge was reaching its boiling point and radio-friendly punk-pop loomed on the horizon, Tool released Undertow, which firmly reinforced metal's prominence as a musical style – but, for once, it had something worthwhile to say. At the forefront of Tool's commercial explosion were striking, haunting visuals that complemented the album's nihilistic yet wistful mood. Drawing equal inspiration from Black Sabbath, alternative theories of science, and Eastern religions, Tool's abrasive sonic assault begins from the opening notes and continues through the final moments of the last composition, an open mockery of organized religion and its incapacity for original thought. With its technical brilliance, musical complexities, and aggressive overtones, Undertow not only paved the way for several bands to break through to the mainstream adolescent mall-rage demographic, it also proved that metal could be simultaneously intelligent, emotional, and brutal.
10,000 Days is the fourth studio album by American rock band Tool. The album was released by Tool Disectional and Volcano Entertainment on April 28, 2006 in parts of Europe, April 29, 2006, in Australia, May 1, 2006 in the United Kingdom, and on May 2, 2006 in North America. Recording took place at O'Henry Studios in Burbank, California, The Loft, and Grandmaster Studios (both in Hollywood, California.) It was mixed at Bay 7 in North Hollywood, California and mastered at Gateway Mastering Studios in Portland, Maine. 10,000 days spawned three singles: Vicarious, The Pot and Jambi.It debuted at number 1 on the Billboard 200 chart, with first week sales of 564,000 copies. By the end of 2007 the album had sold 2.5 million copies worldwide, and was awarded a Platinum certification by the RIAA.