An innovative rappel device from Todd and Desi at Climbing Sutra, now an Imlay Canyon Gear product. Lots of options allow careful adjustment of friction while on rappel. Symmetry allows flipping that extends the life of the device. Part of the new wave of rappel devices that allow changes in friction while rapping. Lots of options has made this a popular rappel device especially for heavish (>170 lbs) canyoneers.