Mainly this Finger Trainer to strengthen the hand and forearm muscles is intended for guitarists, but I was looking for a way to train my velocity at the keyboard playing, what this coach really makes very good. If you have difficulty moving certain finger individually, so you learn the same way. I practice every day for about 5 minutes per hand. This is enough, because if you do not overdo it, otherwise it can be schmerhaft. The back pressure of the springs may be checked by four wheel adjustment infinitely adjustable, which is very useful especially in the beginning. Every time I would buy the Varigrip again.