Petzl I'D S Descender Self-Braking Belay Device w- Anti-Panic Function ANSI & NFPA - YellowPetzl ID S Descender Self Braking Belay Device w Anti Panic Function ANSI & NFPA The self braking ID S descender is primarily designed for work at height and rope access work. It has an ergonomic handle that allows comfortable descent control. The integrated anti panic function and anti error catch limit the risk of an accident due to user error. The AUTO LOCK system allows users to easily position themselves at a workstation without having to