Reap the benefits of variable strength training with this Bowflex SelectTech 840 kettlebell. The single adjustable weight replaces six kettlebells and provides resistance ranging from 8 to 40 lbs. in a convenient space-saving design. A twist of the dial on this Bowflex 840 kettlebell lets you change the desired weight as you follow along with instructional videos or workout on your own. Keep working out with JRNY wherever you go from your phone or tablet; try the Mobile-Only Membership free for 2 months.