The PMI D5™ Work/Rescue Descender has been designed for use on 1/2” (12.5mm) rope. The D5™ Descender is NFPA 1983 (2012) G compliant. The D5™ is a double-stop device with an auto-lock function, which is activated whenever the operator releases the handle; and a panic-brake function, which is not overly sensitive in normal use. The PMI D5™ Work/Rescue Descender also has a doublelocking safety mechanism. In addition to the locking button, the side plates are designed such that the plates cannot be rotated open, whilst under load, due to the position of the carabiner. The PMI D5™ is easy to attach/detach from the rope, without having to detach from the harness, therefore eliminating the risk of accidental dropping of the device. The PMI D5™ features a progressive cam action, which offers precise control during low or high speeds. The cam is made from high grade, solid Stainless Steel, for maximum durability, even in harsh environments, such as geotech work. Designed to accommodate ropes from 12.5 mm to 13.0 mm.