Variable Tension Hand Finger Exerciser Grip Trainer for Music Instrument

5 buttons initiated, one more button than the common exerciser.

Copper core, adjustable tension, make operation smooth and accurate.

Soft button cap makes it comfortable to press. The slim size makes you hold it all in one palm.

Can lock 2 buttons simultaneously.

With 2 brackets, any two of the buttons can be held down. You can choose whatever fingers you want to exercise at your will.