These have been around forever, and can be very helpful. Most amateurs tend to swing at the ball as opposed to through it. Swinging this a few times before hitting balls can help you release the club through the ball which will increase club head speed and accuracy.
This is a very innovative device that can help you in assessing your golf. It gives you all the information at your finger tips, ball speed, distance, impact and alignment. Well worth the price.
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