Kettlebell Kings Adjustable Kettlebell, 10-40 lb 7 Kettlebells in one adjust the weight of the kettlebell to 10, 15, 20, 25, 30, 35 or 40 pounds Versatile - this is the most versatile kettlebell we offer, the weighted plates in the kettlebell Perfect - if you are relatively new to kettlebells or weights this is the most perfect kettlebell