The Aiming By The Numbers Method was developed by world class pool player & instructor Joe Tucker. A unique and incredible efficient method for learning how to pocket the balls. This Aiming By The Numbers Method features:2 Aramith 2″1/4 training balls with unique embedded patterns1 detailed manual that includes 64 pages of instructions, 25 detailed drawings and a glossary2 flat aiming discs that will allow you to practice without a pool table anywhere at anytime2 pocket cheat sheets that will help you to take in the method