The Rock Prodigy Pulley Kit allows you to reduce the resistance, or weight, that you exert on each grip during your hangboard workout. The pulley kit allows you to train difficult grip positions even if you can't hang your full body weight from them. Adjusting resistance is an excellent way to manage and measure progression, and correct choice of resistance reduces the chance of injury while maximizing strength gain. For more information on how resistance can be used in your workout, see the Rock Prodigy Training Center instructions or The Rock Climbers Training Manual from Fixed Pin Publishing.