Really easy to use, great variations for different grip strength and very simple to progressive overload on. Really effective! 

This is a great little tool for when your sitting at home just passing time. For some people the settings on this may be too much or for people like myself, the maximum setting still doesn’t feel like much but you still get a great burn especially in the forearms. This strengthner starts at 10KG resistance all the way to 40KG. The reason I added this little piece of kit on to my last protein order was because I wanted to give my forearms a pump and increase the muscle mass around my lower arms and it’s great for the exact purpose. I’d recommend negatives when using this as you’ll feel it a lot more, so slow motion releasing will benefit.  My only criticism is the build quality. It makes a lot of noise in the spring and doesn’t feel like a quality made product but still does the job exactly as you’d expect. All In all it’s a decent little tool, and you’ll definitely benefit from having it rather than not. 

Makes noise when you close the grip, but what I really like is that no matter what strength you set it at, the grip width will not change enabling you to get a good range of motion from the start, decent what the price I got it at

Only one important thing about the product - looks and feels pretty strong to me. Overall great product!