By splitting the hitter's hands you allow the hitter's top hand to move closer to the barrel and control that part of the bat better. The improved control of the barrel allows the hitter to feel which direction it is moving.
This is where it can get interesting. However, the hitter needs to work on moving the barrel, they can accomplish that during this drill. Yes, a hitter can swing too far up just like they can too much down. The more control the hitter has, the quicker they are able to make adjustments to the path.
Improved Swing Direction
Not only can a hitter’s bat path be more controlled with the split grip, also their swing direction. By splitting the grip, the hitter is forced to hit with a slightly shorter bat in turn making their swing direction that much more important.
If they have a shoulder dominant swing, they will pull off and hit the ball off the end. The limited length of the bat forces the hitter to use the correct posture and create the proper tilt necessary to square the ball up.
Other Drills That Help Improve Swing Direction