Kettle bells are generally made of cast iron and come in specifications such as 8 kilograms, 12 kilograms, 16 kilograms, 20 kilograms, 24 kilograms, 28 kilograms, and 32 kilograms according to their weight. In Chinese folk culture, there are also stone locks that resemble locks in appearance, and their usage is roughly the same as that of kettlebells.

When using kettlebells for fitness exercises, various exercises such as pushing, lifting, lifting, throwing, and squatting jumping can be done. The difference between kettlebell training and dumbbell and barbell training is that kettlebells are more effective in comprehensively improving overall explosive power, so kettlebells and stone locks have been loved by gladiators and martial artists since then.