Ideal for everyone - the hand trainer with an easily adjustable resistance range (10-50 kg), the hand muscle trainer is the perfect grip training device for all ages and fitness levels Materials and Design - The dumbbell set designed with 10x15cm pocket size, perfect training equipment for every place like at home, in the office, while traveling. Materials with non-slip grip and durable spring provide a comfortable grip Rehabilitation Devices - As a rehabilitation device, the hand strength trainer is suitable for treating patients with hand injuries, tendonitis, arthritis, carpal tunnel and tennis elbow. to quickly strengthen targeted muscles without injuring yourself Effect - An increase in the strength of your forearm leads to an increase in the strength of your handles. Ideal for athletes, musicians, golfers, tennis players and mountaineers as accompanying training for climbing What You Get - 2 x Forearm Training / Grip Strengthening Device Material: Stainless steel and ABS. Resistance: 10-50 kg Size: approx. 16 * 11 * 2cm / 6.3 * 4.3 * 0.8inch (L * W * H). Package includes: 2 x training equipment