Hand Squeeze Balls: A simple workout tool for performing easy hand and finger exercises to help improve range of motion, grip strength, and support arthritis relief. Resistance Level Squeeze Trainer Balls available in 5 colors. Easy Hand Exercises and Finger Exercises: Help strengthen your hands and increase range of motion. Hand Stress Balls: Relieve muscle tension and reduce stress when squeezed or manipulated by the hand. Hand Relief: Improves strength, prevents stiffness, relieves joint discomfort, and increases flexibility. Product Name: Hand Grip Function: Muscle Relaxation Apparatus Strength Range: 10-100kg Size: 17 x 2.6 x 12.6cm Weight: 205g Color: Blue Material: Plastic Package Contents: 1 x Hand Dynamometer Grip Note: Only the items listed above are included. Light reflection and different displays may cause the color of the item to appear slightly different from the real thing. Measurement error allowance is +/- 1-3cm.