1、Environmentally‑friendly TPR high‑elastic handle, the handle is wrapped in environmentally friendly rubber, which is flexible, comfortable and elastic, and will not feel uncomfortable even if the hand is gripped hard during use. 2、It can improve the strength of hands, fingers, wrists and forearms, suitable for people suffering from arthritis and tendinitis. Suitable for musicians, athletes, golfers, rock climbers and tennis players, as well as office personnel, etc. 3、Whether you are a man or a woman, a child or an adult, a beginner or an experienced person, you can start grip training anytime, anywhere; suitable for all ages and any hand shape. 4、Spring is fixed with thickened high‑quality iron, which is strong and wear‑resistant, has a long service life, and will not be deformed after long‑term use. 5、Lightweight, so you can easily put them in your bag/pocket and carry them with you when you are out, exercise your hands anytime, anywhere. 6、Adjustable resistance, you can easily adjust it from 22 lbs (10 kg) to 88 lbs (40 kg) with a screw cap according to your own needs. 7、The spring is made of high‑grade stainless steel, with bold design, smooth appearance and better fitness effect. Item Type: Finger Training Device Material: Stainless Steel Spring + TPR Rubber Product Size: Length: Approx. 15cm / 5.9in Adjustable Resistance: From 22lbs (10 Kg) To 88lbs (40 Kg) 1 x Grip Exerciser