Baseball Training Aid Insider Bat Hitting Tool Reviewhttp://tinyurl.com/loxv77c Baseball Training Aid Insider Bat Hitting Tool Emphasize palm up/palm down hand positioning before, during and after contactPromotes proper grip of batTrains hitter not to roll wrists or sweep (cast) before or during contact with ballEmphasizes "staying inside the ball" before and during contactPromotes proper hip rotation during swing
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