Multipurpose. Lifting, supporting and hauling goods with hand-driver Rated load :544Kg(1200lbs) ratio:4.1:1 hub diameter :o 51heated process:Gear, the small gearsurface process:Paint, galvanized, spray FEATURESMultipurpose. Lifting, supporting and hauling goods with hand-driver. Safety and reliability. Easy stop in any position with self-lock. Lubrication. Factory lubrication before packaging. Optional drums. Three options available: single drum, split drum or widened drum. Serial model. suit with different rated load. Super performance. Cast worm with heat-treated gear makes the mechanism unique reliable and durable. Smooth drive. Oil-retaining bushings or bearing for smooth drive. Durable surface finish. Powder-coated surface plus zinc-plating for longer corrosion resistance.