A curved scale for angles (8) is attached to a stand. Slides (10,11) fit on the curved scale for angles so as to be pushed. A carrier (17) has a means (23) of attaching to a golf player's/golfer's body. The carrier and the slides are adapted to each other so that the carrier attached to the golfer's body pushes the slides along the curved scale for angles if the golfer encounters a slide when turning his body and making a golf swing/drive.
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