Guitar finger strength, piano and violin finger devices that power training device FA-10P Rubber Grip

Very useful,good build quality, spring strength is low

good and useful product, apt for the purpose

Very Good for Beginners who want to try out their finger strength.

Nice , but lower rubber grip some time open due to high pressure, improve my finger speed.

very effective

Worst quality

After a few months of use the spring with so bad.

The product quality is ok.Every time I use it I have to be careful that I might not end up breaking it.The spring to change the weight is also not that effective.

I really like it. Works the pinky in extended positions really well. Great for a guitar players

A little difficult to set the strength for each finger but other than that, it works great!

I'm a beginner violinist and this has been a great tool to train my hands.

I like it, my only complaints are that the weighting adjustment isn't very smooth. It's sort of confusing. Also the rubber piece that fits the palm falls off every single time I use it. Other than that it works

Despite the product description, this device is not useful for violin students. The grip is wrong and is not adjustable. Only a 4th finger is adjustable. Plus the distance between the 1st and 2nd fingers is incorrect. Did not include any instructions.