Product nameWrist arm exerciser Color: Black Material: Style 1: PP+Steel Wire +Engineering Plastic Style 2: PP+ carbon steel Size: Style 1:31.5cm*12.5cm*17cm Style two: 26.5cm*15cm*3.5cm The package includes: 1*Wrist arm exerciser Features: 1.High Performance: Our arm exerciser has variable resistance and adjustable grip. 2.Function: Strengthen flexor and extensor muscles. Exercises the forearm, wrist, and fingers. 3.Exquisite Craftsmanship:Fine workmanship, reliable quality, product design is reasonable, simple and convenient, is a very useful arm exerciser. Exquisite Design:Ergonomic design for comfortable handling. Our arm exerciser can increase grip strength.Forearm support for addedcomfort. Quality Guaranteed:If you have any question or any unsatisfactory about the product, please do not hesitate to contact us,we do must help you solve the issue well. When we received it, we will deal with it as soon as possible.