High Quality MaterialOur hand grip strengthener is made of high-quality alloy springs and ABS plastic, which is sturdy, not deformed, and not easily worn. Lower Resistance Exercise Device Suitable for exercising finger flexibility, strength, and coordination. Comfortable GripFinger strength trainer fits the palm of the hand, smooth lines, the right size, practice is not easy to fatigue Stronger Hand Muscles Finger strengthener can be used as hand training devices for guitars, pianos, and other instruments, as well as as as equipment for hand conditioning and rehabilitation. Scope of applicationThe manual exerciser is very suitable for office workers and instrument lovers to exercise their fingers and hands, which helps to maintain flexibility and strength.