One of the absolute best training aids on the market today, the Spider Laser Aim trainer teaches the most basic concepts of shot-making -
1 - The target line. This is where the object ball will travel.
2 - The object ball spot. Often referred to as the Ghostball, this is where your cueball should contact the object ball for the appropriate trajectory.
3 - The tangent line. This is where the cue ball will travel after contact with the object ball.
With the help of world championship players Allen Hopkins and Jeannette Lee aka The Black Widow, you can see instant improvement in your overall game with the use of this advanced training tool.