Description: Quality material: This arm ball is made from quality alloy steel, which is wear resistant, sturdy, and not easy to deform. It can be used repeatedly for a long timeWith handle: The forearm exerciser comes with handles on both ends, making it easy to grip. The handlebar is comfortable and antislip, providing stability for your strength trainingStrength training equipment: This strength training equipment is specifically designed for your wrist and forearm strength training. It also features builtin lights that light up when shaken, adding fun to your workoutSuitable size: This core trainer measures 45 cm in length and 15 cm in width. Its compact structure makes it convenient to carry and useWide application: This wrist ball is nice for men and women alike; suitable for home fitness routines or as a birthday gift among other uses Specification: Material:Alloy Steel Size Chart: 45cmx15cmx15cm/17.72inchx5.91inchx5.91inch Package Includes: 1Arm ExerciserBall Note: Please allow slightly errors 1-2cm differences due to manual measurement.