The 3×5 system is the foundation (concrete) for any wrestling house (technical framework) All technique fits in and on the foundation of position, penetration, and prevention. In this video coach Slay shows the 5 lines of defense to keeping an opponent from getting to your legs. They are your hands, head, arms (shoulder), hips, and tricks. 3 x 5 System, Neutral, Prevention, Words That Start With P