This tool is used to measure the "Carrying Angle" aka: The Power Angle. The Power Angle shows up in 10 to 15 positions at address and repeats throughout the swing. It is the Angle of Power at the top of the swing when Stance Width, Grip, Posture and sequencing of Motion match the Playing Core Region.The trail arm delivery changes with exercise by 4 degrees in the Dominant Core Region. The digital protractor is used to measure the external shoulder rotation which determines the trail arm delivery.
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