The Kettlebell or girya is basically a cast iron weight which typically looks like a cannonball with a handle on top. Kettlebells are typically used for ballistic exercises combining flexibility, cardio, and strength training. DemonBells are no different, except for the fact that they are way cooler. You can choose between a more feminine style like the SugarSkull DemonBelle all the way up to the beast that is "The Big Boi". If nothing else your home gym will look a notch more awesome.