[[Image:Tool.jpg|thumbnail|Tool]]'''''Tool''''' is an alternative rock metal band, formed in 1990 in Los Angeles, California. Due to their long songs with complex song structures, they are considered as Progressive metal (or Art Rock).
[[Nine Inch Nails]] have played festivals with Tool, such as [[2007/08/18 Hasselt, Belgium|Pukkelpop]] and the [[2007/09/02 Bologna, Italy|Independent Days Festival]]. [[Trent Reznor]], [[Danny Lohner]] and [[Charlie Clouser]] also collaborated with singer [[Maynard James Keenan]] on the [[Tapeworm]] project.