Feature(may vary by option.)

●[Features] This hand trainer is a training tool for strengthening grip on your fingertips that is indispensable for musical instruments. Improve flexibility and coordination. It can also be used for musical instruments, finger strengthening necessary for gamers, sports such as bouldering, basketball, finger training or rehabilitation. Whats more, it can help you relieve stress in your daily life or work place. You can train 4 fingers at the same time or train your fingers to focus on your index finger
●Tension adjustment screw: The inner core is pure copper and is equipped with tension adjustment screws. You can adjust the strength by turning the screw on each finger according to your preference, and the adjustable range is between 3Lb to 7Lb. Visible power adjustment gives you better control of your pressure
●Specifications: Adjustable range: 3 Lb - 7 Lb (approx. 3.6 - 7.18 kg) Size: 3.6 x 2.7 x 0.9 inches (91 x 68.5 x 23 mm); Weight: Approx. 2.9 oz (86 g); Durable: Made of ABS material that is durable and resistant to impact and heat
●Comfortable for Hands: Made of a special soft rubber, it is comfortable to your hands and does not hurt your hands even when you train for a long time. Compact Size: Small and lightweight, you can easily carry it in your pocket or bag when you go out, and you can improve your finger strength anytime
●[Warning] Please do not use it at maximum force. Start training with low loads, low frequencies, and low frequencies. (After Sales Service) If you have any incorrect defects, defects, damages, or other questions, please contact us via email (haodyjp@hotmail.com). We will respond to you within 24 hours

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