The Singing Rock Shuttle is designed as a belay device for climbing, but it is also very effective as rope brake for slackline pulley systems. The shuttle acting like prusik sling, allowing transfer in tightening direction and stops in the opposite way. Additionally the Shuttle offers an easy tension release mechanism.

The tension release is realized by a small cord which is fixed to an eye on the Shuttle. Although the release mode should be used with high awareness - danger of rope burns - don´t use the Shuttle over 8 kN pretension in the line.