Metallic Aluminium Men's Professional Hand Practice Actuating Arm Muscle Hand Strength Exercise Finger Wrist Strength $ 6.99 Product information: Application scenarios: running exercise, fitness equipment, fitness body Color: silver, black, red, blue Specification: 12.5 * 10CM Material: Aluminum Spring handle Packing list: Spring grip x 1pc+ Sponge grip x2pc black cloth bag x1pc Product Image: