With the Stamina Adjustable Kettlebell, there is no need to have an entire set of kettlebells or to guess at which weight is right for you. One Stamina Adjustable Kettlebell replaces an entire set of conventional kettlebells at a fraction of the cost, and takes up very little storage space. The adjustable kettlebell is six kettlebells in one. A simple locking pin let’s you choose 16 lbs., 20 lbs., 24 lbs., 28 lbs., 32 lbs., and 36 lbs.: that’s six weights in 4 lb. increments.