Features: 1. **Enhance Grip Strength and Relieve Stress:** Pressing the pressure ball strengthens hand and forearm muscles, improves finger flexibility and agility, and relieves hand fatigue. This simple and effective tool enhances grip strength, aids in injury recovery, releases pressure, and improves endurance. 2. **Finger Strengthening Training Ball Design:** The finger ball's design provides the right amount of resistance to enhance hand strength. The handles allow for an effective grip during exercise without causing restriction or interfering with finger placement. 3. **Personalized Five-Finger Buttons:** Each finger can easily increase the force required to press each piston, and the silicone rubber pad provides comfortable support for the palm and fingertips. 4. **Effective Finger Strength Training:** These hand trainers are perfect for guitarists, office workers, pianists, musicians, artists, artisans, woodcarvers, web designers, and others. They are a must-have for exercising finger strength. 5. **Thoughtful Gift:** The grip enhancer is perfect for gifting to friends and family on Thanksgiving, Father's Day, Mother's Day, birthdays, and other holidays, promoting a more relaxed and healthy lifestyle. Specification: * Product Material: ABS/PET/Carbon Steel Bullet Yellow * Optional Strength: Soft version - 20KG, Strong version - 45KG * Function: Grip strength training, finger strength training Package Includes: * 1x Wrist Trainer Tool