Feature:1. Adjustable: The strength of forearm exerciser can be adjusted according to your needs, which help to enhance the wrist arm force grip.2. Sealing ABS: Wrist strength exerciser use high quality ABS, with good sealing, and more resistant to pressure, which is safe for you to use.3. Flexible: High elastic spring with super flexibility make this forearm force trainer with a substantial bend, and will never crack or deformation.4. Comfortable Use: Hand strength trainer adopted high elasticity and thick foam, non slip and non absorbent, improve the use of comfort, to protect the wrist.5. Improve 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.Specification:Item Type: Wrist TrainerMaterial: Spring steel, ABS plastic, elastic foamSize: Approx. 25 x 14cm / 9.84 x 5.51inFunction: Wrist and arm strength improvement..Package List:1 x Wrist Trainer