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Features: Smart Counting Grip Strengthener Suitable for All Group Injury Rehabilitation & Stress Relief Ergonomic & Portable Design 5 Pack Grip Strengthener Trainer Application: Exercise finger flexibility, enhance the strength of fingers, palms and arms. Rehabilitate injury, relieve hand pressure, stiffness. Package: One adjustable hand strengthener (11-132lbs), one finger stretchers, one finger exerciser, one hand strengthener grip ring and one stress relief grip ball. Customer service: We provide excellent customer service. If you have any question, , we will provide you the solution to get your 100% satisfaction.