GRIP STRENGTH TRAINING KIT - 5 piece hand grip booster workout kit includes an adjustable hand grip strengthener, finger exerciser, resistance band for finger stretcher, grip ring for improving grip, hand therapy ball and storage bag. By alternating the use of these items can fully exercise the strength and flexibility of the fingers, hands and forearms. SMART COUNTING GRIP STRENGTHENER - Our hand grippers have a built-in counting and no battery needed, which will record your exercise number every time you use it. It can help you better know the progress of training. (Press the button firmly to count automatically and turn the button to clear the digital) GRIP STRENGTH TRAINER IMPROVE YOUR GRIP STRENGTH - If you use this excise duty hand grip strengthener frequently, you will find that your hand/fingers/forearms/wrists grip strength has a great improvement. Piano, drummers and musicians, bodybuilding, athletes, golf players, boxing, cyclists. It can also be used for arthritis, tendonitis, carpal tunnel and those who are recovering from tendon surgery.