Robby's Automatic Positioner is specially designed so you throw your ball with precision accuracy and power. When set with the thumb on top of the ball, it produces the normal 11 o'clock - 5 o'clock position, enabling the ball to swing out in a true pendulum.
does this have metal strip for support3/6/2017 - By susie
Yes, this will have a thin metal insert in the back of the insert to provide more support. This insert is removable if you feel like it is causing too much support.3/7/2017 - By Bowling.Com Staff
how do you determine your size5/23/2017 - By joe