Ergonomic Design: The hand dynamometer is ergonomically designed to fit small to large hand sizes. Great for men, women, seniors and teens. Versatile: The easy-to-adjust dial and wide tension range make hand dynamometers a popular choice for patients with arthritis, rheumatoid arthritis, and more. It is also designed for athletes and sports enthusiasts who want to increase strength in their hands, wrists, forearms and fingers. Exquisite Workmanship: The fine workmanship adds more quality assurance to this dynamometer, and it is not easy to break or rust even after prolonged use. WIDE USE: This strength meter is designed for home, sports and clinical, physical education use. Designed for athletes and sports enthusiasts who want to increase strength in their hands, wrists, forearms and fingers for rock climbing, shooting, bodybuilding, golf, tennis and more. The easy-to-adjust dial and wide range of tension make the hand exerciser a popular choice for those Patients with arthritis, rheumatoid arthritis, tendonitis, carpal tunnel, tennis elbow and recovering from wrist and tendon fracture surgery. Hand enhancer for musicians including drummers as well as guitar, piano and violin players. Size: 10.5*15cm/4.13*5.9inch