Injury recovery and hand strength training: squeezing grip strength is very suitable for improving the strength and flexibility of forearms, wrists, fingers and hands, as well as exercising muscles. For people suffering from arthritis, myositis, carpal tunnel injuries, hand injuries, and recovery after tendon surgery, this is a great rehabilitation training. Durable and high-quality material: This handle is made of durable knurled aluminum handle and high-quality spring, making it a long-lasting exercise tool. The aluminum handle is sturdy, lightweight, durable, and safe, without damaging your hands and fingers, providing you with an excellent exercise experience. Suitable for all hand sizes and portable design: The grip is very portable and can be easily placed in a bag or pocket. You can bring these grippers to any place you want to exercise. Use them at home, in the office, or during travel to turn your rest time into a productive exercise time. Whether you are male or female, young or old, beginner or experienced athlete, you can start strength training anytime and anywhere. Suitable for everyone and all sizes of hands.