Product Size: 26*14*1.5cm Color: black, red, blue, Material: spring steel Package content: 1*wrist device 1.GOOD FOR BEGINNERS AND PHYSICAL THERAPY This wrist exerciser is designed to improve strength, power and speed in the wrists, hands and forearms. Sports beginners,tennis players, women, kids and other people who need to increase muscle strength 2.ADJUSTABLE TENSION: Perform regular and reverse wrist curls with the adjustable stabilizer pad, instruction included. TRY IT AT THE MINIMUM TENSION FOR THE FIRST TIME TO USE 3.QUALITY COMFORT: This wrist strengthener is made with heavy duty carbon steel springs and thick 10mm foam stabilizer pad (in comparison to 6mm) for extra comfort and cushion 4.PORTABLE LIGHTWEIGHT: Compact size, easy to take on the go, to the gym, office or use at home 5.MORE BENEFITS: This wrist and forearm developer improves Hand Grip / Fingers / Forearms / Wrists Strength, and can also be used to Release Daily Stress and for Leisure Activities