Simple resistance band with average quality. The resistance is okay for basic strengthening, but the construction does not inspire much confidence and is not as sturdy as it looks in the photos. It does its job for light use, but it is not for demanding training. For its price, it is just average.

A simple pair of pliers that does its job. Personally, I wrapped the handles with foam tape because after a while my palms hurt incredibly.

It's worth its money, it goes up to 40 kilograms which I believe is enough for most beginners. The fact that you can change its weight is a big advantage compared to other dumbbells where you need to buy another one as you progress.

Overall, it's fine and does its job perfectly, I am satisfied. Good quality and the spring, like most, doesn't make any noise. It exercises specific parts of the hand quite well. It's perfect for beginners.

I received it today and I can say that I am completely satisfied with its quality and price. Excellent and made of good material, the spring fortunately does not make noise during exercise like others. It is perfect for a beginner as a first step, from 10 kg to 40 kg with regular training for strength gaining the desired result.

They sent me gray instead of blue, but it's the same.

It is quite practical, if you put it close to 10 kilograms it has a smaller opening, if you put it at 40 kilograms it has the maximum opening. This is probably good because someone with smaller hands would probably want less resistance, while a larger palm usually has more strength and wants a larger opening.

Excellent for initial wrist training stages because the force application can be adjusted and you can perceive your progress. At some point, you will need a band for heavier weights that, no matter how much I searched, I couldn't find with adjustable intensity.