You can swing this rare deal on Bowflex's adjustable kettlebell It was sold out for almost all of 2020 Shep McAllister FacebookTwitterEmail Bowflex’s ultra-popular adjustable weights have been basically impossible to find outside of marked up Craigslist listings for the past year, but today, the brand’s adjustable Kettlebell isn’t just in stock; it’s actually on sale for nearly $30 off. Though it only takes up the space of a single kettlebell on your home gym floor, the Bowflex Kettlebell actually takes the place of six individual weights ranging from eight to 40 pounds. All you have to do is set it on the ground, and turn a dial to decide how much weight you feel like lifting (or swinging, or snatching, as the case may be).