Most kettlebells come in different sizes that correspond to their weights; bigger is heavier and smaller is lighter. Unfortunately, this means the entire setup would consist of several kettlebells that will take up space in your room.

Thankfully, we have the answer for that. Bowflex SelectTech 840 is a kettlebell that offers six different weight options in a form of one. Simply by rotating the dial button, you can select the weight from 8 to 40 pounds, allowing you to perform progressive training.

And if you are new, Bowflex offers training videos on what kind of exercise you can do with SelectTech 840, from beginner level to advanced.