• ✅ Pump, hypertrophy, rehab, prehab and wrist/grip strength all in one: They're great for rehab and prehab regarding wrist, grip, and forearms, so all grip trainers should have one on standby.
  
  
• ✅ Correspond to 50 dumbbells of different weights. Control the speed and power with your hand, 10,000 rotational speed per minute about 35 lb.
  
  
• ✅ Pure mechanical wrist ball, no batteries or power source, environmentally friendly without electromagnetic radiation, military-grade plastic shell to protect your spinner gyro ball toy.
  
  
• ✅ Auto start with internal pre-tensioner, incredible high speed up to 20,000 rotational speed per minute pass through testing. When the speed meets the minimum requirement, led will shinning.
  

PRODUCT DETAILS

Material: aluminum alloy+canvas+plastic
Size: 7 cm(diam), 6 cm(height), 49 cm(cord length)
Weight: 360 g

Package

wrist trainer ball *1
cord *1