A finger trainer, used to train your finger strength, endurance, flexibility and coordination when . Very convenient to use. Ergonomic design, so that you will not hurt your hands when you use it. Features - Color: Black -Material:Silicone - Size: 7.50X2.00X1.80cm/2.95X0.79X0.71in - Owning the and break resistance ability, very durable. - This finger trainer is used to train the strength and endurance of your fingers. - It is also used to train the flexibility and coordination of the fingers. Ergonomic design, so that you will not hurt your hands when you use it. - Can be combined into different resistances; exercise the strength of fingers, forearms and wrists during arm stretching exercises, and can also separate and train the flexibility of each finger separately, which is convenient and practical. - Exercise your finger strength and coordination to help you when playing the piano guitar. Package list: 20 x finger training tools