Designed to improve the wrist muscles, simply set the inner section spinning, rhythmic circular hand and wrist movements not only maintain the rotation, but also make it steadily faster. Increased in centrifugal forces make it harder to keep hold adding resistance to your wrist thus making you stronger.
Available in many varieties, standard is Neon Pro which includes lights and RPM counter. 250Hz models have no lights.
Powerball Original 250Hz Amber/Blue - £9.99
Powerball Original 250Hz Pro - £17.99
Powerball Neon Blue/Green/Red Pro - £17.99
Powerball Signature Edition (Deluxe)- £26.99