Recognize cut angles at a glance with this easy to use aiming tool. Do what World Champion, Allison Fisher recommends: Practice with Bat Billiard Aim Trainer. By removing parts of the cue ball that never come into contact with the object ball, the Billiard Aim Trainer created a cue ball that allows you to see right through it. You will then have the ability to determine cut angles and the knowledge to know how to exactly pocket a ball.