HshDUti Wrist Trainer Ball Auto-Start Wrist Strengthener Gyroscopic Forearm Exerciser Gyro Ball Gyrosopic Wrist Exercisers for Strengthen Arms, Fingers, Shoulders, Wrist Bones and Muscles

Great value for money and fast delivery, the rubber ring that runs around the outside of the ball tends to slip so it needs to be fixed on more securely also the strap that comes with the wrist trainer is difficult to attach.