Amazon.comMade of solid cast iron, CAP Barbell kettlebells are both versatile and durable, offering a surprisingly varied series of exercises to tone your entire body, particularly core muscles.What are Kettlebells?Kettlebells are weights with handles that allow you to sculpt your entire body using full-body movements. While Kettlebell workouts have been used by athletes for centuries, they were recently re-introduced to the fitness world, thanks in large part to celebrities and personal trainers, who appreciate the fat burning benefits these simple devices provide.WarrantyThis CAP Barbell product includes a limited 30-day manufacturer\'s warranty against defects in materials and workmanship.About CAP BarbellCAP Barbell has been a leading fitness equipment maker for more than 25 years. Originally producing only free weights and benches, the company now carries upwards of 600 products across more than ten categories, and its brands include CAP Barbell, Velocity Exercise, Tone Fitness, and CAP Strength.Product DescriptionKettlebells are used to exercise all major muscle groups, including arms, chest, back, abs, legs and core. The benefits of kettlebell exercises include muscle building, improving core strength, boosting balance, providing better bone health, burning calories, increasing energy levels, enhancing overall mood and more.