PER4M Reaction Belts are for quick response separation training and improve quickness and enhance forward, backward and lateral juke and shadow drills. Reaction Belts promote competition between athletes and challenges them to improvise footwork. Use the 10 training and practice drill cards to get started using the Reaction Belts. Each Reaction Belt contains a free sliding ring to allow movement in all directions. The Breakaway Tethers separate when too much tension is added, to prevent accidental falls or injuries. Price includes (2) Reaction Belt w/ free sliding ring, (1) 4" Breakaway Tether, (1) 7" Breakaway Tether, (1) 10" Breakaway Tether, (1) Set of Instructional Drill Cards.