Systematic Wrist Exchange Attacks by Johnni DijuliusAttack IMMEDIATELY off of initial contact with Johnni DiJulius and his unique Wrist Exchange Attacks! Harvard Wrestling Coach Johnni DiJulius, provides crystal clear instruction on how to systematically increase your attack options with the Wrist Exchange. Your opponent will think they have control, only to find out that they are mistaken! Avoid stalling by forcing the action with quick hitting techniques like the JDJ Special, one of Johnnis unique