specification: Item Type: Wrist Trainer_x000D_Material: Spring steel, ABS plastic, elastic foam_x000D_Size: Approx. 25 x 14cm / 9.84 x 5.51in _x000D_Function: Wrist and arm strength improvement. Features: 1Adjustable: The strength of forearm exerciser can be adjusted according to your needs, which help to enhance the wrist arm force grip. 2Sealing ABS: Wrist strength exerciser use high quality ABS, with good sealing, and more resistant to pressure, which is safe for you to use. 3Flexible: High elastic spring with super flexibility make this forearm force trainer with a substantial bend, and will never crack or deformation. 4Comfortable Use: Hand strength trainer adopted high elasticity and thick foam, non slip and non absorbent, improve the use of comfort, to protect the wrist. 5Improve Wrist Strength: Wrist strengthener with tight connected spring, which will not loose, suitable for every person who loves sports to improve wrist and arm strength. PackageList: 1 x Wrist Trainer