Ergonomic and comfortable, Compact and , strengthen your forearm and wrist force anytime, anywhere. ABS material has high strength, corrosion resistance, high-temperature resistance, , wear-resistance, and durability, etc., which increases the service life of the product. Giant screen display, 42mm diameter, solid pointer display clear. By training the reaction ability and strength between the fingers, the fingers are more flexible, and the fingers are more skillful and enhance the strength of the fingers. Comfortable grip, Four fingers fit, can make better use of strength. size:165 x 75mm Material:plastic colour:Blue+black Package Contents: 1 x Hand Grip Dynamometer Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.