Spin it. It pushes back. Harder as it goes faster.
The metal gyroscope core creates resistance that your forearm, wrist and grip have to fight to keep it spinning. It's a direct way to train grip and forearm endurance without picking up a weight.
- Auto-start: no pull cord, just the ball and your wrist
- Built-in counter
- LED lights
- PC, ABS and silicone shell
Use it during breaks, on a call, or as a finisher after an upper-body session. Climbers, grapplers, lifters, and anyone who types for a living: your forearms are probably undertrained. This is a simple way to fix that.