Auto-Start Wrist Power Gyro Ball, Wrist Strengthener and Forearm Exerciser for Stronger Arm Fingers Wrist Bones and Muscle with LED Lights

Effective and does what it says. Great value at low price. The LED lights make it slightly childish but its alright.

This gyro ball is very easy to start, which I love. It’s the perfect way to finish off an upper body workout—just a minute or so of spinning gives my forearms a great final burn. The LED lights make it fun to use, too. ​One thing to note: It can get quite noisy as the speed increases. It's not a silent device, but if you don't mind the sound, it's a fantastic tool for a quick muscle pump at the end of your routine!

I bought 2, the first one was blue and i damaged it during recoiling as i was new to this thing. The second one was black in colour and i still have it and i am using this whenever i like. Quality is good, valued, easy to use and performance is smooth in this black one

Great tool for exercising the tendons connected with tennis elbow. The faster you rotate the wrist the more you resistance you get and better the exercise. ( Just need to jump start it once before every session using your thumbs, the instructions are given in the box and are very easy to understand) As a tennis and badminton player myself I will recommend this to everyone who plays these sports regularly. Fantastic product!

Es un excelente producto, de muy buena calidad, especialmente para ejercitar el antebrazo, la muñeca, los dedos, en sí, un gran aliado para terapia y relajación.. 100 % recomendado.

I love the all metal construction of this gyro ball. I bought it specifically for the all metal and extra weight. I have a plastic one by a different company, and this ball is definitely better all around. It spins smoother and just feels more premium. I keep this spinner in my car and use it during my commute every day. It's definitely very effective at increasing strength in grip, wrist, forearm and biceps. Definitely worth the extra money over plastic models. The only thing I would change is to have the wind-up feature easier to hold while winding, with either some texture or rubber inserts for traction while turning with thumbs (I'm taking about on the gyroscope, part that spins) Would buy again!