Nsd powerball 350hz diablo pro metal gyro forearm workout strength training hand exercise ball hand strengthener
All 350hz metal diablo models feature all 350hz metal diablo models feature our 6 mode accura v2 0 digital counter perfect for sports golfers squash tennis fencing basketball badminton archery cricket etc and fitness great for rehabilitation carpal tunnel rsi arthritis etc complete with a digital speed meter recommended for 14 years and over
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