Auto-Start NSD Spinner Gyro Ball – Up to 15,000 RPM Premium hand strengthener and wrist exerciser for grip strength training, forearm workout, and pain relief; durable and portable

It works well, the directions are pretty clear, there is a learning curve , but once you’ve got it mastered it is pretty easy.

Years ago I owed one of the plastic blue ones with the green ball. It was practical but the bearings began to go after a while. Now, years later I purchased this one and I'm well impressed. Reading the description, I did not fully realize the inner workings were all medal parts supporting the gyro ball. It does not require a pull cord to kick it off and is crafted with a spring mechanism that allows you to get it going effortlessly. It is a nice desk stress reliever and good forearm developer to boot. It is highly recommended and worth the extra change.

For all the reviews that state something along the line of "quickly spins down" or similar, you simply need to get the motion of your wrist correct. As stated in the instructions (and various videos), once the spinner is moving you need to use a steady "stirring" motion with your hand/wrist to get the gyro to keep spinning. It only took me a couple of tries to get this working - but others may need a bit of practice. Note that the starter is just that. It will get the spinner moving fast enough to start, but nowhere near fast enough to offer much resistance. Once you get the RPMs up, the resistance you feel increases quickly.I got the auto-start model and wind it with my thumbs. For those that don't have the hand strength to do so you may find that pulling the wheel across a countertop is an easier way to wind it.Because the torque push back you feel in your hand is directly related to the speed the spinner is moving, you are in complete control of how hard of workout your hands / wrists / forearms get. If you keep the speed fairly slow, it will be a very easy exercise. If you make the spinner go very quickly, you will be giving your hand a very firm workout.I purchased this to help rehabilitate my hand after breaking it. I'd lost nearly all my grip strength after having a cast on for about 7 weeks. This has helped a great deal and I find it much more fun to use than some of the other tools I've also been using like rehab putty and grip springs.

The media could not be loaded. Fun way to get a wrist and forearm workout while working. It makes some noise but not overly loud. Takes some time to get the hang of it but overall, really enjoy it.

Originally purchased for my teenaged baseball player for grip strengthening (batting).Pros: Reasonably pricedCons: Broke in under a month under normal useBottom line: Junk and possibly harmful for elbows of teenaged pitchers.The manufacturer pitches this product as great for conditioning the forearm for tennis, batting, golf - any sport that involves gripping a shaft. I purchased this product with that in mind without first doing some research and obtaining expert opinions from sports medicine. I know better and did not do this. In talking with several orthopedic surgeons and a physical therapist, they cautioned use for developing teenaged elbows, especially those who pitch baseball. There is virtually no scientific literature on the pediatric effects of this device. Its breaking was actually a good thing! I elected to be conservative and not replace the device. Instead, my son uses the FlexBar manufactured by TheraBand to strength the forearm and stabilizes the elbow.

This is kind of a weird piece of exercising equipment, but I've found it useful and fun. I got it to help avoid additional tendonitis in my elbow due to archery. It seems to have done that, although giving the affected elbow some rest first also helped. No substitute for that. I have had no problems since I started using this regularly, however. I'm not convinced of its central role in that, but I do seem to have stronger support muscles all the way up to the shoulders as a result of using it. And because it's fun to use, I'll keep using it. I don't recommend using it if you are already having some pain. Rest the affected part and then start using this as a preventive measure, and keep using it. I usually do a minute in each hand, two times through, per day.At first it was hard to get going, but now that I've got the hang of it, it's pretty easy to get it spun up. I do better with my right hand- my left hand isn't as coordinated and I can't do the finely tuned rotation as well. However, I actually spin it faster with my left hand once I get it going, though I can't keep it going as long. The thumb wind-up start on this model is worth paying extra for. I wouldn't want to have to use a string to start it each time. It takes a while to spin down, so you can switch hands and get it spun up to speed again without having to restart it. The rubber band around the middle gets a bit out of position sometimes, so I flipped it upside down and leave a little gap so it rests on a ridge and it stays in place. Makes kind of a neat whirring sound when it's spinning fast. I wouldn't waste money on an RPM indicator- I'm not sure why you'd care.***April 2019 update: The ball stopped getting into high gear, so I took it apart and cleaned it (Three tiny screws; do NOT lube it with anything!). It worked for another month but now I can't get it to really spin up, so I'm ordering another one. 4.5 years isn't a bad product lifetime for something like this these days. By the way, it still spins, but doesn't go into that whirring, high resistance mode where it starts sounding like a prop engine plane when you get the gyro really going, and eventually it just slows and stops. Some people that complain it doesn't work may not be getting it to that resistance point- takes some practice- or they may have gotten a defective unit. You will definitely hear and feel the difference from the spinning when you first start it to getting it into that resistance mode.