Rock act Isis has been drafted as the opening act for all but the first four shows of the tour.

Tool has expanded the itinerary for its next round of North American touring, which, as previously reported, will begin Aug. 5 with a performance at the San Diego Street Scene festival. Dates are now on tap through Sept. 29 in Mansfield, Mass.

Tool is out in support of its new album, "10,000 Days," which has already sold 1.1 million copies in the United States since its May release, according to Nielsen SoundScan. The single "Vicarious" remains in the top 5 of Billboard's Modern Rock chart after 11 weeks.

Rock act Isis has been drafted as the opening act for all but the first four shows of the tour. The group's as-yet-untitled new album features eight songs spread out over nearly an hour of music, according to Isis' Web site. It will arrive Oct. 31 via Ipecac.

Here are Tool's tour dates:

Aug. 5: San Diego (Street Scene Festival)
Aug. 6: Fresno, Calif. (Selland Arena)
Aug. 18-19: Honolulu (Blaisdell Center)
Aug. 22: Vancouver (GM Place)
Aug. 24: Calgary, Alberta (Pengrowth Saddledome)
Aug. 25: Edmonton, Alberta (Rexall Place)
Aug. 27: George, Wash. (Gorge Amphitheatre)
Aug. 29: West Valley, Utah (E Center)
Aug. 30: Englewood, Colo. (Coors Amphitheatre)
Sept. 1: Las Vegas (Theatre Under the Stars)
Sept. 2: Marysville, Calif. (Sleep Train Amphitheatre)
Sept. 3: Oakland, Calif. (Oakland Arena)
Sept. 5: Bakersfield, Calif. (Rabobank Arena)
Sept. 7: Los Angeles (Staples Center)
Sept. 11: Woodlands, Texas (Mitchell Pavilion)
Sept. 12: San Antonio (AT&T Center)
Sept. 14: Dallas (American Airlines Center)
Sept. 15: Kansas City, Mo. (Kemper Arena)
Sept. 16: Minneapolis (Target Center)
Sept. 18: Chicago (Allstate Arena)
Sept. 21: Columbus, Ohio (Nationwide Arena)
Sept. 22: Auburn Hills, Mich. (Palace of Auburn Hills)
Sept. 23: Toronto (Molson Amphitheatre)
Sept. 25: Cleveland (Wolstein Center)
Sept. 28: Camden, N.J. (Tweeter Center)
Sept. 29: Mansfield, Mass. (Tweeter Center)