Check the listing for details. Hand Grip Adjustable Trainer Gripper Strengthener Gym Strength Power Exerciser. Color: Black, Condition: New. Listed at 9.42 USD. ---HAND TRAINER: Improve hand, finger, wrist and forearm strength, improve hand and finger grip, endurance, flexibility, muscle tone, and fine and gross motor skills. ---ADJUSTABLE HAND GRIPPER: From 5kg to 60kg, you can adjust the resistance to your level; Go slow, then go hard on yourself while also increasing your grip strength. ---REHABILITATION DEVICES: As rehabilitation devices, the hand strength trainer is suitable for treating patients with hand injuries, tendonitis, arthritis, carpal tunnel and tennis elbow. to quickly strengthen targeted muscles without injury ---IMPROVE YOUR GRIP & RESTORE STRENGTH: The adjustable grip strengthener is great for strengthening hands, forearms, wrists and fingers. Simple and efficient, it helps increase grip, reduce stress and increase endurance.