Tool's first label release, "72826", is a demo cassette that was released in 1991 that features a few songs from both their EP, "Opiate", released in 1992, and their first studio album, "Undertow", released in 1993.
The cassette is extremely rare and has become a sought after item amongst Tool fans, however it can now be found on the internet in digital form.
This User-contributed text is available under the Creative Commons By-SA License; Source: Last.fm.