The self -weight of the explosion -proof hand stubburies is slightly light, which can hang heavy objects within 500 kg vertically. The standard length of the lifting chain is 3 meters and the zipper is 2.5 meters. The accessories of the inverted chain handblasts generally include bracelets, bond gears, lifting sprockets, shells, hook components, spiny wheels, pawns, and so on. Among them, the hood is an important accessory of the hand -stretched gourd. On the outside of the hand to pour the gourd, the opponent pulls the gourd to play a protective role. It has functions such as corrosion resistance, rust, and dustproof.