The CrossCore® Rotational Bodyweight Training System was originally developed for the military and MMA fighters. The CrossCore180® is currently in use by professional athletes and sports teams, schools, clubs, military and rehabilitation facilities. The rotation and versatility of the CrossCore® Rotational Bodyweight Training System allow athletes to duplicate and train for the movements they perform out on the field and in the streets. The key to the effectiveness of the CrossCore180® lies within the Patent Pending pulley system. For a more stabilized workout, comparable to other "strap" type products, leave the pin engaged in the pulley. But when it's time to get serious, "PULL THE PIN" letting the pulley rotate freely and take your training where its never been before.