Descriptions Size: 26 * 14cm Tension Size: Max 20kg Material: Environmentally friendly sponge, ABS plastic, nylon, carbon spring steel wire Color black Scope of delivery: 1 x Hand exerciser Quality and Comfort: This wrist extender is made of sturdy carbon steel springs and thickened sponges that can better protect your arms and wrists during exercise. Very convenient to use: You can use it while you watch TV, while you watch TV while exercising your arm strength. You dont need to spend any extra time on training. You can use it when your hands are free Strengthens the wrist muscles: This wrist exerciser is designed to improve the strength and speed of the forearms and wrists. This is ideal for athletes, pianists, golfers and tennis players. Adjustable Design: Use the adjustable stabilizer foam pad to do a forward or backward workout in the middle of the wrist reinforcement. If you want to increase the resistance, all you have to do is move the stabilizing pad towards the handle. If you want to decrease the resistance, all you have to do is move the stabilizing pad onto the U-shaped foam. Unexpectedly light and portable: Although the wrist amplifiers are made of stainless steel, its not as heavy as expected. Its easy to take out and take to the office or gym.