Hand Squeeze Balls:A simple workout tool to use in performing easy hand and finger exercises to help with the range of motion, grip strength, arthritis pain. Resistance Level Squeeze Trainer Balls with 5 colors. Easy Hand Exercises And Finger Exercises:Help strengthen your hands and , increase your range of motion. Hand Stress Balls:Relieve muscle tension and ease stress when squeezed or manipulated by the hand and . Hand : Improves strength, prevent stiffness, relieve joint pain and increase flexibility. Product name:Hand Grip Function:Muscle Relex Apparatus Strenght Range:10-100Kg Size:17x2.6x12.6cm Weight:205g Colour:black Material:plastic Package Contents: 1 x Hand Dynamometer Grip Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.