ISC D5 Descender - with Panic Brake - 240kg Rated Load - 12.7mm Dia RopeISC D5 Work Rescue Descender The D5TM is a double stop device with an auto lock function (which is activated whenever the operator lets go of the handle) and a panic brake which is not overly sensitive in normal use. The D5 Descender has a double safety locking mechanism, which means when loaded, the side plates cannot be rotated open due to the positioning of the Karabiner and the push button click lock safety closure. The D5 is easy to attach detach