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Gyroscopic Strength Ball By Science Museum
- The most enjoyable way to exercise and strengthen your hand-grip and forearm.
- Switch on the LCD Revometer, and using the pull cord provided, spin the internal gyro.
- How many revs can you build by spinning your wrists? The record stands at over 14,000 RPM!
- As the revs build so does the torque, making it a real challenge to control.
- Batteries included.
As new boxed with one month guarantee
Price: £5.00
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