Hand Finger Thumb Exerciser

Multiple functions: Can increase finger flexibility, reduce hand fatigue, improve hand strength.
Easy to use: You can hold it and squeeze it as you like to relieve stress and make your fingers more flexible.
High-quality material: Made of high-quality spring steel, it is corrosion resistant and can be used for a long time.
Safety design: The plastic cover at both ends of the spring ball can protect fingers from injury.
Lightweight: Easy to carry indoors and outdoors, such as playgrounds, camping, climbing, hiking, etc.