Xelerator

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Has any one used this? If so, what do you think?

 

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I have one. It is real easy to make your own. As a warm up device, when you don't have a catcher and have limited space OK. I have mixed feelings on how it will improve your pitching motion.

 

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Semperfi-the on you have pictured is for BB. The one for SB is slightly longer. It is good for warming up but will add it will help build up arm speed. It's also good helping arm stay long through the hip. If the windmill is improper you will know it in seconds when it's wobbling all over and you hit yourself in the legs. Been to a few camps that will use a long sock w/weighted ball to achieve same purpose.