BestMal Wrist Power Gyro Ball, Auto-Start Power Wrist Ball, Gyroscopic Hand Exercise Ball with Wristband Gyro Bag, Decompression Exercise Grip Ball for Stronger Arm Fingers Wrist Bones and Muscle

Features: 1. METAL CORE MORE DURABLE: The zinc alloy electroplated core has a moderate weight and does not hurt your hands Stable without cracking,beautiful and durable 2. SIMPLE OPERATION: Built-in automatic elastic device. You just push the arrow to the end and loosen the center of the ball and start easily. 3. INTIMATE DESIGN WRIST ROPE PROTECTION: Wear a special wrist strap when using To prevent the speed from flying too fast and flying out 4. NO POWER REQUIRED: Wrist rotation and internal rotation Core interactionThe centrifugal force generated High-speed operation of the iron core "5.GREAT GIFT: It's a great gift for people who love sport or work all day in the office.It’s quite useful for for strength and rehab your wrist and forearm. It’s also a great gift for musician like guitar player, piano player for strengthen their finger strength. How to use:" How to use: 1.Put your hand in the strap circle for safety. 2.Push the rotor follow the direction of the arrow by thumb about two circle. 3.Release your thumb and hold the ball in hand. 4.Roate your wrist to make the ball spinning. Specifications: Color: Black Material: ABS+Zinc alloy Package Size:3.15 x 2.95 x 2.76in /8 x 7.5 x 7cm Package Weight: 0.66lb/0.3kg Package list: 1 x Gyro Ball 1 x Wristband 1 x Gyro Bag 1 x User Guide Our products have been well tested, you can rest assured that your purchase is guaranteed. Any problems please feel free to contact us first.