The Brazilian Jiu Jitsu heel hook is a highly effective technique especially when applied from the guard position. The best time to execute this technique is when you are breaking the Guard of the opponent. Then it is applied quickly by falling back and locking the ankle in position. This is the single most effective leg lock that can be applied from the guard position. Some people would argue that the BJJ Heel Hook from The Guard is the best leg lock. What must be remembered is that its application should be conducted carefully because it can cause serious damage