Best Seller | Stamina X Fortress Power Tower Build a powerful and lean physique with the Stamina|X Fortress Power Tower. The Fortress is the only power tower to include a pull-up bar, dip bar, adjustable plyo box, stronghold grips, ab straps and boulder fit rock climbing hand holds. ... more Stamina X Fortress Power Tower Build a powerful and lean physique with the Stamina|X Fortress Power Tower. The Fortress is the only power tower to include a pull-up bar, dip bar, adjustable plyo box, stronghold grips, ab straps and boulder fit rock climbing hand holds. Bed Bath & Beyond | | $789.99 $710.99 FREE shipping go to store |