Official kettlebell of and used by - IKFF, JKSF, WAKSC, California Open, Texas Open Made for Kettlebell Sport, meets GSU, IKFF and IUKL standards Guaranteed accuracy to the weight you purchase within 0.3 kilograms or we will replace the bell at NO cost No toxic fillers or paints used in our kettlebells Smaller size and curvature compared to other models for easier insertion with comfort overhead and in the rack position during lifts Made by precision single casting technology with no welds