【Adjustable Strength】With a strength range of 5-60kg, strengthen clockwise and weaken counterclockwise, easily adjustable from beginner to advanced use, a key to adjusting to meet consumer needs, convenient for the whole family. 【High-Quality Spring, Strong and Durable】The grip strength device adopts a high-strength spring with a diameter of 3.0mm and 10 coils, making it more robust and durable, with a long service life. 【Ergonomic Handle, Comfortable Grip】The ergonomically designed handle fits the palm and provides a comfortable grip. The handle is made of TPE material, which further enhances grip, is non-slip and sweat-resistant, and prevents calluses even with long-term use. 【Compact and Portable, Exercise, Relaxation, and Decompression Anytime】Compact and lightweight, you can carry it with you and exercise anytime, anywhere. Not only does it increase hand strength, but it can also relieve stress.