72826 is a demo tape by American rock band Tool. It was released in 1991 in very limited quantities, probably between 100 and 200 exist. It is also referred to by the name Toolshed, or Tool.

There has been some speculations made about the name, some noting that '72826' spells 'Satan' on a telephone keypad.

72826 was recorded in Maynard James Keenan's rehearsal room, on a 4-track recorder. It features early versions of songs that reappeared in their later releases: "Cold and Ugly", "Hush", "Part of Me" and "Jerk-Off" on Opiate, and "Crawl Away" and "Sober" on Undertow.

All of the tracks were written and composed by Tool.

72826 features six tracks. Two of them, "Cold and Ugly" and "Jerk-Off", were never released as studio recordings outside this demo. Instead, they were re-recorded live at the Jello Loft on New Year's Eve 1991, the band's second public show. The live recordings were featured on the band's next EP, Opiate.