Ideal for personal rescue, emergency escape, rescue operations, or specialized rope work as a friction control, double-stop descending system. The system gradually releases its load when the handle is moved towards the central position. The double-stop mode locks should a panic grab happen but unlocks progressively when the handle is released. The FERNO FDU is available with a friction rack for rescue loads (two persons). Extensively tested and certified to AS/NZS 4488.1:1997 with 11 mm rope.