The aluminum alloy hand holds the gourd chain tight wire, using the spiny wheel structure. There are three gears of rising and down air gears. Adjustment according to the direction of the operation, it can be used. The 0.75 -ton aluminum alloy handle is only 5 kg in weight. The chain uses a 5mm galvanized lifting chain with a length of 1.5 meters. The chain hand pulls the gourd before use to check to smooth the lifting chain to avoid the chain entangled; if the chain is deformed, replace the new chain in time; It will make the chain stuck and avoid this factor; the chain is slightly rusty, wipe the surface clean, apply rust -proof oil, and the severe rust of rust needs to replace the new chain in time.