UPGRADE THREE-HANDLE KETTLEBELL WEIGHT: Ergonomic three-handle kettlebell design for Russian Twists AB Exercise, Weightlifting and Core Training, the unique side handle kettlebell is very comfortable and stable to hold, which is convenient for more comfortable exercises. HIGH-QUALITY IRON SAND MIXTURE KETTLEBELL: Built-in high-quality iron-sand mixture, solid kettlebell, small size with no welds, weak spots, or seams. Great for training indoor & outdoor.