4 Pcs Wrist Trainer Ball Auto Start Hand Gyro Ball Wrist Strengthener Self Starting Forearm Exerciser with Bag and Strap for Strengthening Arms Fingers Wrist Training

• Easy to Use: the auto start feature makes it easy to use the gyro ball wrist exerciser; According to the direction of the arrow, push the inner core, and it will start rotating automatically, fits in your hand, comfortable to use
• Enough Balls for Effective Practice: you will receive 4 wrist strengtheners, each of the ball comes with a bag and a strap, giving you enough balls to share with your friend or family; With multiple balls, you can practice without the need for frequent replacements
• Build Strength and Improve Hand Grip: wrist strength trainer is a good tool for building strength and improving hand grip; It helps strengthen your finger, wrist, and forearm muscle, suitable for sport lover, fitness lover and more
• Colorful LED Lights: wrist exerciser comes with 5 color speed changing lights, when the rotating speed becomes faster, the LED light will light up, adding a fun feeling and excitement to your exercise routine
• Quality Material: made of zinc alloy and silicone, wrist trainer ball is sturdy and long lasting, it can withstand constant and repeated use without showing signs of wear and tear