1. 6 ton electric hoist 2.Best motors,brakes,gears.pulleys,drums,hooks 3.Limit Protection: load & traversing 4. iso certifi 1.Model ... (0.8/8)7(0.7/7)3.5 (0.35/3.5)Travel speedM/MIN2020/3020/3020/3020/3020/3020 ... ,make it lift steadily and accurately.5.Protection: Load limter,traversing limter,Low electric power limiter 6 ton 110v electric chain hoist