Here is another adjustable kettlebell that helps you build a stronger body. The OuchTek Adjustable Kettlebell (2.5 to 25lbs) has a 2.5lbs main part and 6 removable spacer disks. It can be used to perform a wide variety of upper body, strength training, and core exercises.
This adjustable kettlebell has 7 adjustable weight levels. Costs under $56 at this time.