Emphasizes the internal rotation of the shoulder as well as bringing your hands into your load
Hitter gets on plane sooner
Internal coil and explosiveness with the back hip
Too much back shoulder tilt
Off balanced swing
Lead shoulder opens too soon
Hitters hands drop
Shaft of the bat rolls off the back shoulder
Identify the hitters smooth transition from their internal rotation and load up until the explosion of the swing.
The hitters extension to and through the ball
High finish should be noticeable.