The Fat Free Golf Swing Trainer is a what is also referred to as a compression board. There are a couple of useful drills built into this unit’s functionality.
Green Line & Penny
This setup involves placing a penny in the unit between the ball mount and the target. The green line is aligned with the target line and provides a visual aid for swing plane and club face alignment.
Hit the shot, concentrating on trying to hit the penny. This helps you “hit down” on the ball, which is where more ball compression is gained and longer distance. The drill also helps train you not to hit behind the ball.
U – Compression
By using the U shaped section you can train yourself not to hit fat shots or hit behind the ball. Place the ball in the U shaped area between the forks. Practice not hitting the board behind the ball.
Drills I thought of, being a hack
If you find it hard to catch the very center of the club face think of this. By placing the ball to the near or far forks, one could practice bringing the club squarely on the ball as well. So if you shank shots, place the ball near the far fork. If you usually hit toe shots, place the ball near the far fork. Try not to hit the forks.