Product Description Size: 26*14*1.5cm Color: black, red, blue Material: spring steel Package content: 1*wrist device 1.GREAT FOR BEGINNERS AND REHABILITATION This wrist exerciser is designed to enhance strength, power, and speed in the wrists, hands, and forearms. It's suitable for sports beginners, tennis players, women, children, and anyone looking to boost muscle strength. 2.ADJUSTABLE TENSION: Perform regular and reverse wrist curls with the adjustable stabilizer pad. Instructions included. START WITH THE MINIMUM TENSION FOR YOUR FIRST USE. 3.QUALITY & COMFORT: This wrist strengthener is constructed with heavy-duty carbon steel springs and a thick 10mm foam stabilizer pad (compared to 6mm) for additional comfort and cushioning. 4.PORTABLE & LIGHTWEIGHT: Compact size makes it easy to carry, perfect for the gym, office, or home use. 5.ADDITIONAL BENEFITS: This wrist and forearm developer boosts hand grip, finger, forearm, and wrist strength, and can also be used to relieve daily stress and for leisure activities.