Our dumbbell is used to strengthen the forearm muscles and fingers. Supplied in a 2-pack enables synchronous finger training for both hands. Ideal for climbers, bodybuilders, golfers, surfers, tennis players, drummers, guitarists, pianists, massagers. Our unique hand trainer can be continuously adjusted between 5 - 60kg and is therefore perfect for beginners and advanced users! Just turn the little black dial to adjust the resistance to your abilities. To improve grip strength, hand endurance, dexterity, muscle tone and fine motor skills. That is why it is suitable for the patients with hand injuries, tendonitis, arthritis, etc. to strengthen the target muscles quickly. The grip strength trainers are also an ideal training device for men, women and seniors. The non-slip rubber handle prevents the finger trainer from accidentally slipping out of your hand when you sweat and wet. Compact size: 6.1x 4.2 in (L x W), comfortable grip fits almost many age groups and hand sizes. Product descriptions Have you encountered the following issues? - Your grip is hindering your progress in the gym. - You want to say goodbye to weak forearms forever. - Would you like to reap the benefits of increased grip strength and the resulting effects on exercise / weight training? It only costs a duration and a reasonable price, and then you can have a powerful hand! Now use our hand trainer to build muscle strength in your hands, wrists, fingers and forearms. Hand exerciser makes you look more beautiful / handsome and strong. Properties Color: Black, Red (As pictures show) Material: rubber + stainless steel springs One piece per weight: 156g Adjustable Resistance Range: 11-132 lbs (5-60KG)