Arm Strong Baseball Pitching Throwing Trainer for Players/Coaches - $40 (Gaithersburg)

Selling Arm Strong trainer for players and coaches.
Safely trains proper muscles to give more power, velocity, and accuracy.
Quickly clips to a fence or anchor.
Patented Rotating Ball for Realistic Training.
Sports-Specific and Natural Throwing Motion.
Mint condition.
Cash only.
Thanks for looking.
Price listed or best offer that includes payment and pickup asap.