Gyro Ball Wrist Exerciser - Hand Grip Strength Trainer for Carpal Tunnel Relief & Rehabilitation - Perfect for Gamers, Office Workers & Athletes

A bit of an old school piece of equipment your Dad has likely dabbled with in the past, especially when you had to start them off with a piece of string.

The new age of gyro balls enable you to simply wind up using your thumbs then get straight into the action.

A simple yet effective training tool and a worthy addition to your accessories.