Product features: Finger exercises: This finger grip trainer allows you to train the strength, flexibility and endurance of each finger individually. Strengthens the entire arm and thus improves the strength of the hand, wrist and forearm. Simple and practical. Material: This finger grip trainer is made of high-quality ABS, TPE and carbon steel spring materials. The finger strength trainer is elastic, ergonomic and comfortable to hold. Compact and portable: This finger strength trainer is small in size and easily fits in a gym bag or pocket. You can train anytime, anywhere, whether you are at work or at leisure. Wide application: This grip trainer has a wide range of uses and is suitable for climbers, tennis players, bassists, guitarists, pianists, athletes, musicians and people with hand fatigue. Note: 1. Due to different lighting conditions, the actual color may differ slightly from the picture. 2. Please allow 1-3 cm error due to manual measurement. Material: ABS