Cast iron chain ball for track and field training, available in 1kg to 7.26kg options for versatile strength conditioning. Made from high-grade steel wire with precision welding for durability and balanced weight distribution. Ideal for hammer throw practice, functional fitness workouts, and athletic performance training. Smooth polished surface prevents hand abrasion during swings. Standard competition weight of 7.26kg meets professional athletic requirements. Bulk pricing available for sports teams and training facilities. Ships globally with wholesale discounts for large quantity orders.