Train with purpose and push your limits. The NIVIA Power-Grip Level-3 Donut is designed for athletes seeking heavy resistance training to maximize grip strength, forearm endurance, and hand stability. Crafted from durable latex-free material, this donut provides consistent tension, ensuring every squeeze challenges your muscles safely and effectively. Ideal for strength athletes, gym enthusiasts, and functional training programs, the Power-Grip Level-3 helps you build power, endurance, and confidence in every rep.