NSD Essential Crystal Spinner Gyro Ball | Grip Strengthener for Forearms, Wrist & Hands | String Start Design, Up to 18,000 RPM | Portable Wrist Trainer & Workout Equipment | Ideal for Desk Workers, Athletes & Musicians

I was able to pick up this NSD Powerball for $17 here on Amazon and what a steal!It probably took me about twenty minutes to get the motion down and, to be honest, I thought I got a broken one for the first ten because I couldn't get it to do anything. The best advice I can give is not to fight the motion you feel in the gyro. It's not about just spinning your hand around as fast or as hard as you can, it's about matching and then revving up the cadence of the gyro. It's fascinating to watch it switch directions when changing hands or rotation and equally amazing watching it jump about when you've ceased moving and the gyro just spins and spins and spins.As far as the exercise goes, I can certainly feel the burn and wish that I was able to keep it going for longer without becoming sore. I got this to help strengthen my hands, wrists, and forearms, which get abused daily as a computer tech and also an avid landscaper. I can certainly see this helping, but I have to be careful not to overdo it, as it honestly is quite addicting and fun (not really a valid complaint :)My only con is cheap construction. While I don't think it's going to stop working anytime soon, mine makes a lot of squealing noises at low speeds. Once revved up, it's no longer audible and you can only hear the whir of the gyro. At the price point, it's not really something worth complaining about. Whenever this one wears out, I'm quite sure I'll go for a nicer model. Very satisfied.::EDIT::04/17/13About a month with the NSD Gyro and I am feeling amazing. The first three weeks were spent exercising one day and being sore for two, and again, and again. I'm happy to say that after a week or so, I began to have this warm tingling feeling spreading from fingertip to elbow while I lay in bed at night. My god, that's blood circulation! Within the last week I've been able to make it an every or every other day affair. I like to put in earbuds and either play air drums, or dance around a bit with the gyro. It really is fascinatingly fun to go with a good beat. I like to get rhythms going where I can swing the gyro around half speed on the down beat to mix things up. My highest praise goes to the fact that the exercises can be as easy or as hard as you'd like without any need to change weights. I tend to start out with a wide, slow arc holding it as a baseball, switching rotation clockwise and counterclockwise before switching hands, just to warm up. Then I speed up a tad, holding the gyro like you would the end of a jump rope: clockwise, counterclockwise, switch hands. Then I grip the gyro like I'm holding a glass of water and I tip it forward and back, forward and back (this is an amazing workout...if you can manage to switch rotation of the gyro on this one, kudos...it's hard). Then I hold it by nothing but my fingertips and again pretend that I'm holding one end of a jump roap: clockwise, counterclockwise, switch hands. This is when I go back to the original slow arcs, holding it as a baseball. Once I've loosened up a bit, I do it all over again, but usually at double speed, or close to it. Realistically, you can make this spin in almost any way you can imagine, as long as you go with the flow :)It still squeaks when slowing down, but shows no signs of wear. Very impressed.

I had never even heard of these before Amazon started bombarding me with ads for them. Normally that makes me want to avoid the product, but I ended up buying this mostly out of curiosity because I couldn't quite understand how it was supposed to work. I'm so glad I did. This thing is one of my favorite tools ever for working on grip and forearm strength.I really like that you can use it in multiple different ways and that it works multiple different areas, depending on how you use it.The instructions that came with it were not very clear in describing how to use it, but that's not a big deal. The description right on the Amazon page is much clearer and is what cleared it up for me.I love that it's small and easily portable so you can use it literally anywhere. Works your whole hand and forearm, and in different ways depending on how you use it and at what speeds. And while it can be much more intense at fast speeds, you can also get a really intense workout at very low speeds. The key is to experiment with different grips and spin patterns and directions (changing spin direction is as easy as a flick of the wrist and barely noticeable). Takes maybe only 10-15 minutes of experimenting and practice at the beginning to really get a feel for what you can do with it.It does squeak a little at higher intensities, indicating that maybe the quality isn't the best, but whatever, I've had it for about 8 months now with no issues. Even if it craps out after a year, it's been so useful that I'd gladly buy another one.

I am an automotive technician, have been for 15 years. I am always interested in ways to keep my hands and grip healthy and strong. I train my grip and also lift weights regularly so this was something new. Let me start by saying if you do NOT have well developed hand and forearm muscles already this will be a tool to really develop that. If you already have strong hands or train grip this is still a great tool. One warning, if you have strong hands you need to use common sense. If you squeeze the plastic too hard it can crack. This will not be a problem for most buyers though. I love this little thing I compare it to a stationary bike for your hands. You can “sprint” and get this thing humming at max effort and get a really deep burn. Or you can get it going and easily keep it going at a slower pace for longer periods of time. I’m not a trained expert, but I am a fitness enthusiast and I feel like this is a great tool to get blood flowing through the hand and forearms. I will have one in my car and laying around at work or in the house for life.

I bought mines during a lightning deal. I saw how many people were buying it and looked at the great ratings, so I said to myself "Heck, why not?" I ordered it. When it finally got my hands on it I gave it a few tries... I immediately thought about returning it since I couldn't keep it spinning for more than 10 seconds. I almost threw it to the side, but I decided to give it one more shot. All these glowing reviews you read here cannot be wrong! So I gave it another try.I freaked out a bit at how long I got it spinning using lots of action from my hand and wrist. I started rotating my wrist faster and in a tighter circle, the ball started to get louder and LOUDER. I originally thought NSD Power made up the claim of "26.8 lb-in of torque at 10,000 RPM." I spun it so fast that I started to lose my grip on this thing and it felt like it wanted to fly right out of my hand!It is a challenge to get it up and running at first. TIP: You do NOT have to pull really hard on the string to get it going. You need a good and smooth pull; you do not have to yank on the string. This is just to get it started. Once you start rolling your wrist and follow through with hand motions, you can get it to spin faster and faster.After a few minutes of using it, I can feel my forearms and wrist feel a bit tighter since it got that work out. Now I want to see if I can do the same with my left arm and try to swap the ball between hands while keeping it spinning.It is worth a buy!

I never had one of these befor. I a lot about them and wanted one. I have to go and buy one now on the island because the seller decided to sell me something broken. I never used one and did not know that these were electronic i thought they were just a tool that was used but now that i have one that works from island its a awsome item.

If the gyroscope mechanism hadn’t broke. Yup, very sad. I knew a rock climber that used one of these and could grip and pull himself up on the ridge of a door frame. He said that device helped him maintain those muscles in his hands and arms. So I found this one on Amazon. I didn’t get to use it much and kept it at work as a sort of fidget toy / grip, arm, hand strengthener (but damn it was loud af so that didn’t really pan out either). The other day I picked it up to use because the office was empty and the gyroscope thing inside just doesn’t work anymore. I will definitely be getting another one of these from a different brand (probably from an actual brick and mortar sporting goods store). These things are great! They’re like fidget toys that calm your nerves while building muscle and coordination at the same time. Just not this one….

Im so happy with this, you want a strong wrist? Get this little thing.

I had a Dynaflex branded gyro like this 20 years ago. IMO, this one feels a little bit smoother in the hand. Also, I don’t understand people complaining about the string start. The string is only for people who have never used one before and don’t know how to move their wrist in the correct way to speed the gyro up. This gyro is very easy to get started by just flicking the wheel with the thumb of your opposite hand. I haven’t even taken the string out of the package. I don’t need it.

It's so easy to start and we'll worth the money. I would certainly buy one of these again if required

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Really effective and good value for money. Quiet and much easier to get started than my previous one.

Toller Spinner für kleines Geld. Passt genau zu meinen Händen. Wird etwas lauter mit der Zeit, aber bei täglichem Training lässt sich Abnutzung nicht vermeiden. Wurde allerdings nach 3 Wochen schon lauter, deswegen nur 4 Sterne. Kommt aus Taiwan, deswegen sympathisch!

Got this for my husband to strengthen his wrist, works well