Features： 1、Finger Strength Training: Professional finger strengthener has great elasticity and can effectively improve finger strength for athletes and musicians. 2、Adjustable: The thumb distance can be adjusted, and the appropriate card position is selected according to the length of the finger and the training intensity. 3、Multipurpose: Suitable for wrist extensors and finger extensors training, finger tension exercise, finger grip exercise, finger lifting training. 4、Scope of Application: Finger extensor strengthener can be used for finger pulling exercise, finger grip exercise, finger pulling exercise. 5、Comfortable Fit: Hand strengthener can be worn by anyone with comfortable fit, hand strengthener is regardless of wrist circumference. Specification： Item Type: Finger Exercising Trainer Material: Silicone + steel + plastic Application: Designed for finger rehabilitation training, functional exercises for the long tendon of the thumb of the hand, prevention and correction of contracture stiffness, extensor carpi and draft muscle palsy (called lateral palsy) Scope of Application: Finger pulling exercise, finger grip exercise, finger pulling exercise Package List： 1 x Finger Exercising Trainer 5 x Spare Finger Sleeve