Get stronger grip, wrist, and forearm strength with this Dyna-Flex Powerball wrist exerciser. This gyroscopic trainer creates smooth, continuous resistance with no batteries required—perfect for fitness, rehab, or daily hand strengthening.

✔ Condition: New open box

✔ Tested: Spins smoothly with strong resistance

✔ Portable: Compact and easy to use anywhere

✔ No batteries needed – self-powered gyroscopic motion

Great for:

•Grip strength training

•Wrist & forearm workouts

•Physical therapy / rehab

•Athletes, musicians, gamers

Includes:

Powerball unit (as shown)

Original box

Ships fast and carefully packed.