Spin it up and feel your forearm, wrist and grip light up. The auto-start gyro inside builds resistance the faster you spin - no string, no setup, just a flick of the thumb and a pocket-sized workout for grip strength and wrist stability.
Compact enough for your desk drawer, gym bag or commute, and genuinely addictive to pick up. Great as a recovery tool between sessions or a fun way to train your grip anywhere.

