Watch Tool Dust Off Brooding Deep Cut 'Sweat' Live

Prog-metal veterans play 'Opiate' opener for first time since 1998 during recent San Francisco show

Tool hauled out an extremely deep cut, 1992's "Sweat," during a recent performance at San Francisco's Bill Graham Civic Auditorium. The prog-metal veterans surprised the crowd with the Opiate track, which they hadn't played live since 1998, during their January 7th show, Loudwire reports. 

Fan-shot footage from the gig, the second date of their January trek, finds the band transitioning from Danny Carey's furious drum solo into the brooding track, defined by Carey's beastly ride cymbals and Maynard James Keenan's dynamic vocals. 

Tool's recent setlist has featured plenty of classic material, including the Opiate title-track and an old-school cover of Led Zeppelin's "No Quarter." But they've also nodded toward the future, incorporating four-minute instrumental "Descending," which the band first unveiled during their lone 2015 show, a Halloween performance in Arizona that found the quartet dressed up as Led Zeppelin. 

Though the band has been quiet about details on their long-awaited fifth LP, guitarist Adam Jones recently told Rolling Stone that they have "20 potential song ideas."

"I'll tell you, it's wonderful," he said of the sessions. "Things are really flowing and going really well, and I'm just blown away at the stuff that's coming together. I'm excited and can't wait for it to be done. It's something I've been missing for a long time [laughs], that beautiful collaboration that we have because we're all so different and have different tastes. But again, when you are all meeting in the middle and that thing you do that meets in the middle is just beautiful, it's very rewarding. So yes, I'm very happy."