WINCSPACE Wrist Trainer Power Gyro Exerciser Ball
Gyro ball/Force ball/power ball/magic balls get model sport now.If you don't know how to play it,can search video via youtube<br>It is fun and good for hands,wrist,shoulder, forearms,biceps and good as warm-up sport before you do climbing,golf,basketball etc <br>Also if you use computer or play the piano for long time,you can play this ball every day for 15~20 minutes.You will feel you hand won't be so pain.<br>DO not drop the ball on hard surface at any time,the heavy rotor will damage.<br>DO not touch the ball rotor when it is spinning at high speeds,it will burn.<br><br>Size: 2.9 * 2.9 * 2.4 in<br>Weight: 9.88 oz<br><br>If you don't know how to play, please contact us, we will send video to you.