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Feature

Compact and Ultra-light design, you can practice without your instrument anywhere anytime
Soft button cap makes it comfortable to press, also non-slip and sweat-resistant, The slim size makes you hold it all in one palm
Reversible molded grip uncovers simulated strings to help develop and maintain finger calluses for string musicians
It can handle multiple parts, such as hand, palm, finger, wrist, etc.It can practice endurance, tension, agility, coordination.
It can help, they improve the speed of the game and sensitivity.It is suitable for all ages.

Description

Size as shown Colour: Black Squeeze each finger key to develop muscles of the fingers and hands , train forearm and wrists , and relieve tension from a rough day . Great for carpal tunnel treatment , athletes at the gym , violin and piano players , as a guitarist callus builder , to build hand muscle for rock climbing training , as finger strengtheners for the elderly , or a s a fun exercise for the office . Made of durable heavy duty plastic with a comfortable soft rubber coated base . Truly one of the most important fitness products today the adjustable resistance is a new twist on the old classic . Includes lifetime manufacturer's warranty and 100% satisfaction guarantee .