ITEM NAME:Practice Guide Golf Swing Trainer Beginner Alignment Club Gesture Corrector #gib Store Home Promotion Hot Item Add to Fav.1 x Golf Swing Trainer Golf Clubs Gesture Corrector. Keep the retainer at 90 degrees right angle to the left arm on the downstroke; keep the retainer club and left arm in line when hitting the ball. Preparatory batter holder, the club and the right arm in line.