About this item1. Fitness is very suitable for strengthening the strength, endurance, flexibility, muscle tension, and fine and gross motor skills of hands, wrists, and forearms.2. The arm muscle trainer uses torque steps of 5-120 kg to increase forearm strength from 11 pounds to 265 pounds. This is a very professional fitness equipment with grip.3. Durable and ergonomic design: Comfortable rubber handles with non-slip grips and top-quality design with stainless steel extension springs. Durable and safe, it will not hurt your hands and fingers. Suitable for your hands and fingers' working habits.4. Physical therapy and rehabilitation equipment: Perfect for rheumatoid arthritis, stroke rehab, carpal tunnel, tenosynovitis, fracture, broken wrist, tendon surgery, tennis elbow, reducing stiffness and pain.5. Athletes and musical instruments: the grip strength trainer kit is perfect for improving the power and flexibility of wrists, fingers, and forearms. PERFECT GIFTS for climbers, tennis players, guitar, piano, drummers, and musicians.Products include:1*Hand gripNotices:1.Please allow 1-2mm differences due to manual measurement, thanks.2.There could be some slight differences in the color tone of the pictures and the actual item.3. If there is any problem with the product, please contact me before leaving a comment, I will do my best to solve the problem for you. Thank you for your understanding.