Cast iron kettlebell weight set is not only used for arm workouts, but for ab & core workout, leg workout, back workout. Adjustable kettlebell training help improve the ability to sustain fast muscular contractions, teach the body to adjust to a constantly changing center of gravity, build forearms, strengthen grip &improve cardio-respiratory fitness. The Fitness kettlebell set is the perfect tool for swings, deadlifts, squats, weightlifting, pulls, overhead throws & rotational training.