This Power Gripper Metal Series is designed for professional-grade hand strength training, helping users improve grip strength, finger endurance, and overall hand performance. Built with a durable metal construction, it offers long-lasting resistance and reliable performance for consistent training. Available in resistance levels ranging from 50lbs to 400lbs, it allows users of different fitness levels to progressively build strength, from beginners to advanced athletes. This makes it suitable for rehabilitation, sports training, bodybuilding, climbing, and general fitness improvement.