NSD Manual Thumb Wind Start Spinner Gyro Ball – Up to 15,000-18,000 RPM Premium & Durable Hand Strengthener and Wrist Exerciser for Grip Strength Training, Forearm Workout, and Pain Relief

I love this. It is essentially a gyroscope. The ball contains an inner ball which is weighted and rests on gimbals You don't need a string to start it. It has an internal spring. Once wound up, the ball beings to turn, By rotating your wrist in a particular way best learned by viewing a video, the speed of the ball will increase. As the ball increases in speed, the laws of physics dictate that attempting to rotate its spin axis by applying torque, the gyroscope will try and rotate at right angles to the force you apply. This is called gyroscopic procession. This is why gyroscopes are used in navigational systems on earth and in space. They want to stay in position and by so doing, there is an initial frame of reference. As the speed of the gyroscope increases it gets more and more difficult, that is you need to apply more force to get the ball to spin faster. As a result you are putting stress on the muscles of the wrist and forearm...exerciser. It is a novel way to strengthen your arm and is just plain fun. I recommend you also purchase the NSD Power SM-02 Precision Multi-function Speedometer so you can measure how fast you can get the gyroscope to spin.

This spinner worked well for about a day, at which point I disassembled it to install the spin counter attachment. Once I got it apart I realized that the internal mechanism was slightly different than every other guide I could find online; it included a separate white plastic ring which no other model seems to have. Long story short, I can't seem to figure out how to get it put back together in a way that will actually engage the gyroscope. I looked online for a guide and could find nothing. I used their customer support form, which failed to work with an error about trying again several times. I called their customer support number, which rang until it reached a voicemail that hadn't been set up. I can not seem to make contact with NSD in any way to get my spinner working again. Poor form.

Bought this to help exercise my wrist and forearm after an RSI scare. Not gonna lie. I spent a few hours figuring out how exactly to spin this, until enough videos made me realize that I had to spin it slower and not faster - I was spinning too fast to stay in sync. The key for me was the wrist motion (can't really explain it, but you should be rotating it horizontally and tilting it on the vertical axis) as well as trying to "feel" it sync. Once I got it working, I couldn't resist using it even when tired - there's just something about the flashing lights and the whirling and the resistance and the motion that just feels rewarding. I'm pretty sure the flashing lights are a way of gamifying it - which is a really good thing if it gets you do something that helps you. I bought the auto start model because I knew I would lose the rip-cord of the other models, and while I didn't get a counter, after a week with this I decided to get one to keep track of how well I'm doing with it. Did it cure my RSI? Too early to tell. Is it a great exercise? HECK YEAH

A little hard to operate at first. The trick is to move "with the spin" to go faster and faster. Certainly works well, but if I was to buy again, I would get the one with the string pull starter!

I bought this because a friend had a similar model. This one is good for the money, and is great for getting started with these to see if you like them before buying something better made. I used it for a few weeks before the bearings started to wear, and you can really hear things starting to wear out inside. It still works, but needs a bit more to get it going than it did before. I wish I would have gotten the one with the counter on it instead, cause I'm a fan of seeing stats on things.

These are worth the money! After trying the cheaper, string-wound spinners, which ultimately were WEAKER in their resistance and a pain to string-up, I watched several Youtube videos and decided to spend the money on something I'd truly find to be a good quality Spinner. This is it! Not only with an easy, auto-start mechanism, but the resistance builds as high as I can go with my strength, and I love the flashing light colors. I did have 1 that stopped working after a short period of time (1 month from purchase), but so far the replacement is working fine (after 2 months of purchase).

I ordered this for a buddy of mine who has been undergoing treatment (chemo and radiation) for a brain tumor. He's not doing well at all and has lost a great deal of strength in is hands, arms and wrists. This device is actually helping him, which is all I could have hoped for. This nice thing about this device is that it works well at even slow speeds. You don't have to crank it up very high to get some resistance, which is perfect for my old buddy (he's 86 years old). I highly recommend the NSD Roll 'N Spin if you want or need a minimal fatigue hand and wrist workout, whether you're recovering from an injury or you just need to build up your strength slowly/gradually. You CAN speed it up and get a workout if want to, but at lower speeds it perfect for someone who just can't handle heavy loads. HIGHLY recommended.

Have not been able to start it. Have tried and followed directions included and on website. I’m at the point I am assuming it is defective. I have not returned yet, waiting to see if my kids can get it going before I give up.

I’ve owned a gyro like this before, but this is much superior: The biggest improvement on this for me is the spring loaded start up function, I hated using a string to start one of these up, then the ends would break off the string making it useless. This requires a little more wrist action to get it running after starting, but it works the same as any other gyroball after you do. I purchased this for rehabilitation from a broken wrist, I must strengthen the stabilization muscles of the wrist again now, this was recommended by my physiotherapist. The easy start up feature of this makes it much more practicle and desirable for me to just pick up and use regularly once or twice a day for a miniworkout. I couldn’t use this though until just today when my doctor told me the bone is pretty much fully healed, please check with your doctor as well before using to ensure it will not cause further damage if this is what you buy it for. It’s a great wrist strengthener as well though for anyone without injuries. The string based ones are good as well, but I will rebuy one of these before I go back to that kind of model.

Good quality.

Es más de lo que podía esperar, es muy innovador, tanto que no podía creer que esta maravilla existiera, en tres días mi dolor de muñeca se quitó, ya qué pasó mucho tiempo usando el mouse, aparte me ha ayudado a fortalecer más que la muñeca. ¡La recomiendo ampliamente! Para los que pasan horas en los videojuegos o están mucho tiempo en la computadora - ¡Todo se vuelve más liviano en tu vida! 💪🏻 Además de los increíbles colores que llaman mucho la atención⚛️

This is an awesome product! Makes for great party conversations and competitions! I was hesitant about not picking a model with the electronic counter, but thought that since the counter faces your palm anyway, that you would no see it. There are 3 colors to help you know how fast you're going. The red LED indicates that the spinner turns at 1000rpm. The "purple" LED" indicates that you're at 4000rpm. When the spinner changes to a solid blue light, it means that you're turning at 7000rpm, which is about half the maximum speed of this model. I try to keep a cruising speed while this spinner stays on the blue color for a good work out! Yes, your forearms will start to feel the burn! :) I wish there could be more LED in this model to indicate maybe 10 000rpm and then 13 000 rpm. Still great gadget to train your grip!I highly suggest the autostart function! You just crank the rotor with your thumbs instead of using the red pull-string that comes with the other models (nothing to lose).

Características tal cual están en la descripción. Producto de buena calidad.