DescriptionThe product is made of high-quality ABS material, which is durable and can serve you for a long time. Its main function is to help piano beginners correct incorrect piano playing gestures, so as to develop good piano playing habits for beginners. When you are not proficient, you can correct the posture of one hand first; after proficient, you can do it with both hands.Features-Material: ABS. -Size: About 12.50X10.00X10.70cm/ 4.91X3.93X4.21inch. -The main function of this piano hand corrector is to correct the hand shape for beginners. -Its buttons are comfortable, and the depth of the buttons is basically the same as that of a piano. -It can improve the motor function of your fingers and make your fingers more flexible. -This piano finger orthosis is a pair, and you can practice with both hands at the same time. -The anti-folding finger design can help you better correct and cultivate muscle memory.