“Atmospheric soundscapes building into metal workouts, the abrasiveness replaced with a desire to break boundaries”: How Tool, slowly but surely, went prog rock

Maynard James Keenan of Tool performs on stage at the Good Things Festival at Flemington Race course on December 5, 2025 in Melbourne, Australia. (Photo by Martin Philbey)
(Image credit: Getty Images)

In 2019 Tool finally made their albums available on streaming services – presenting the opportunity to select their proggiest material for fans of the genre.

Given that the band sprang from grunge and alt metal, 1992 EP Opiate and 1993 album Undertow didn’t offer much in the way of prog, but that changed with 1996’s Ænima. Hence our 12-track list featuring material from that record and onward.


1. Forty Six & 2 (Ænima)

Mixing basic 4/4 time with 7/8, the fifth track on Ænima deals with lyrical concepts that espouse Carl Jung and American mystic Drunvalo Melchizedek.

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It opens with Justin Chancellor's loose but mesmeric bass, building in slow fashion over repetitive guitar riffs into a big proggy groove. Amazingly, it was released as a single.

Forty Six & 2 - YouTube Forty Six & 2 - YouTube
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2. Third Eye (Ænima)

Opening with drug-related clips from the late comedian Bill Hicks, the closing track from Ænima is a near 14-minute epic that helped point the way the band would take with later work.

It’s expansive, brooding, prone to occasional bursts of frenetic activity with a message about expanding the mind. The fact that producer Dave Bottrill had worked with King Crimson the year before on Thrak should not go unnoticed

The live version from the 2000 live album Salival is held to be the best version.


3. The Grudge (Lateralus)

Hypnotic bass lines, chanting vocals, crashing guitar crescendos. The Grudge opens 2001's Lateralus as a statement of proggy intent.

By this point Tool were far more about atmospheric soundscapes building into prog metal workouts. The abrasiveness of early albums had been replaced with a maturity and desire to break musical boundaries.

TOOL - The Grudge (Official Audio) - YouTube TOOL - The Grudge (Official Audio) - YouTube
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4. Parabol/Parabola (Lateralus)

The two tracks merge into one nine-minute prog rock workout. The opening Parabol features Maynard James Keenan's chant-like vocals over a haunting musical backdrop.

Then the band crash in with Parabola, Adam Jones' guitar searing through the mix as the band lock into a super-tight progressive groove.

Parabola was released as a single, with one of Jones' trademark videos to accompany it.

TOOL - Parabola (Official Video) - YouTube TOOL - Parabola (Official Video) - YouTube
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5. Lateralus (Lateralus)

Drummer Danny Carey has said of the title track: “It was originally titled 9-8-7, for the time signatures. Then it turned out that 987 was the 16th number of the Fibonacci sequence – so that was cool.”

Is that prog enough for you? The nine-minute plus song mixes 9/8, 8/8 and 7/8 as Keenan implores humans to explore a deeper understanding of everything.

Tool - Lateralus (Live DVD 2014) - YouTube Tool - Lateralus (Live DVD 2014) - YouTube
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6. Disposition/Reflection/Triad (Lateralus)

Although listed as three separate songs, this triptych towards the end of the album are meant to coalesce into one lengthy piece of music, running at over 20 minutes in total.

Opening with the gentle, reflective Disposition, the band move into centrepiece Reflection, which slowly builds before bursting into life about eight minutes in. The more percussive Triad gradually brings things to a close.

Possibly Tool’s proggiest moment ever!

TOOL - Disposition, Reflection, Triad [REUPLOAD] - YouTube TOOL - Disposition, Reflection, Triad [REUPLOAD] - YouTube
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7. Vicarious (10,000 Days)

About as catchy and immediate as Tool get on 10,000 Days, the opening track and first single is the closest connection to the band's past – in other words, all that was left of the alt. metal band of yore.

It’s hardly metal though, riding in on a big fat prog groove as Keenan sings of the thrill for people who live through others in the media eye.

TOOL - Vicarious (Official Video) - YouTube TOOL - Vicarious (Official Video) - YouTube
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8. Wings For Marie/10,000 Days (Wings Pt 2) (10,000 Days)

This epic two-parter is either the sound of a band living out its fantasies, playing the long-form music so beloved of drummer Carey, a prog fan from an early age – or the sound of a band disappearing up its own arse. Clearly, we favour the former. Typically haunting to open, and building to a fine rolling groove.

TOOL - 10,000 Days (Wings Pt 2) (Audio) - YouTube TOOL - 10,000 Days (Wings Pt 2) (Audio) - YouTube
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9. Rosetta Stoned (10,000 Days)

In keeping with the band's love of drug-related allegory, Rosetta Stoned imagines a man waking from a DMT trip, encompassing aliens and his spiritual awakening. The song uses a staggering array of time signatures – 4/4, 5/8, 5/4, 11/8, 3/4, and 6/4 – if that's not prog enough for you, we don't know what is!

TOOL - Rosetta Stoned (Audio) - YouTube TOOL - Rosetta Stoned (Audio) - YouTube
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10. Intension/Right In Two (10,000 Days)

Another proggy couplet, these two songs joined at the end of 10,000 Days are about as reflective as the band get.

They display their more ambient side on opener Intension before the more epic Right In Two breaks through with more trademark jarring rhythms, twisted time signatures and odd percussive breaks.

A pointer to where Tool Were headed with Fear Inoculum?

TOOL live in Melbourne 2 Feb 2011 - Intension/Right in Two - YouTube TOOL live in Melbourne 2 Feb 2011 - Intension/Right in Two - YouTube
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11. Fear Inoculum (Fear Inoculum)

The five-year wait between Lateralus and 10,000 Days was nothing compared to the 13 years fans had to wait for Tool's fifth studio album. When it did arrive in 2019, Fear Inoculum was placed under intense scrutiny, some beleiving it didn’t hold up to such a delay.

Having lived with the music for the ensuing years, with the opportunity to see most of the songs performed live, the general feeling is that it’s a fine addition to the canon, and certainly the most overty proggy – six of the album’s 10 songs weighing in at over 10 minutes.

The opening title track is a brooding beast, which opened the band's live shows in emphatic style, creating as much a sense of anticipation on the album as it did in the live arena.

TOOL - Fear Inoculum (Audio) - YouTube TOOL - Fear Inoculum (Audio) - YouTube
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12. Invincible (Fear Inoculum)

Our seciond choice from Tool’s most recent album is the one the band chose to close their live shows with – the 12-minute-plus Invincible.

Despite its length, the song is actually one of the catchiest tunes on the record, riding along on Carey and Chancellor’s tribal rhythm and featuring an inspired vocal performance from Keenan, whoe switches between gentle singing and his more regular loud and mournful howl.

Then at its midway point a typically knotty and twisted Jones guitar solo unfurls. A fitting show closer.


Jerry Ewing

Writer and broadcaster Jerry Ewing is the Editor of Prog Magazine which he founded for Future Publishing in 2009. He grew up in Sydney and began his writing career in London for Metal Forces magazine in 1989. He has since written for Metal Hammer, Maxim, Vox, Stuff and Bizarre magazines, among others. He created and edited Classic Rock Magazine for Dennis Publishing in 1998 and is the author of a variety of books on both music and sport, including Wonderous Stories; A Journey Through The Landscape Of Progressive Rock.

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