Features Steel Formed case protects both gear and hand chain wheel slides. Double Cover protection against moisture and dirt. Break mechanism will activate instantly when operation is stopped. Double Ratchet Pawls for extra safety. Powder metal bushing to increase mechanical efficiency. Load Chain Guide & Stripper assures proper fit of load chain into sheave. Slack End Anchorage prevents any accident caused by over lowering. Hot forged, heat treated, steel swivel hooks. Grade 80 Load Chain, 5mm Hand Chain.