Hand Exerciser- Improve hand, finger, wrist and forearm strength, improve hand and finger grip, endurance, flexibility, muscle tone and fine and gross motor skills. Adjustable Resistance- There is a button handle bracket on the front, you can adjust the resistance within the range of 10-50kg (22-110lbs). Turn the knob clockwise to vary the resistance for higher resistance levels. Non-slip Handle- Covered with environmentally friendly TPE material, soft to prevent your hands from slipping accidentally when sweating. The ergonomic design makes it easy to grip and fits all hand sizes. Ideal for men and women, seniors and teens. Lightweight and Portable- The handle weighs 150g and is 15cm long, easy to clean and store. The lightweight handle design makes it ideal for storing in your pocket while on the go. You can exercise anytime, anywhere. Service- Provide 12-month after-sales service and electronic invoice. If you have any questions while using the product, please contact us. We will provide you with a fast and friendly solution.