Product Size: 26*14*1.5cm Color: Black Material: spring steel Package Contents: 1*Wrist Device 1. Suitable for Beginners and Physical Therapy This wrist exerciser is designed to improve wrist, hand and forearm strength, power and speed. Sports beginners, tennis players, women, children, etc. who need to increase muscle strength 2. Adjustable Tension: Regular and reverse wrist curls with adjustable stabilization pads, instructions included. Try with minimum tension on first use 3. QUALITY AND COMFORT: This wrist strengthener is made of heavy duty carbon steel springs and 10mm thick foam stabilization pads (compared to 6mm) for extra comfort and cushioning 4. Portable and Lightweight: Small size, easy to carry around, go to gym, office or use at home 5. More benefits: This wrist and forearm developer improves hand grip/finger/forearm/wrist strength and can also be used to release daily stress and leisure activities