There are many kinds of hand wrenches, including mini hand wrenches, standard hand wrenches and aluminum alloy hand wrenches. They are also called tighteners, which can tighten cables. Lifting aluminum alloy hand hoist is mainly used for the maintenance of railway lines, with light self-weight, light hand tension and long service life. Reasonable use of aluminum alloy hand-held hoist, we must abide by the operating instructions and operating rules and regulations, so that aluminum alloy hand-held hoist can maintain a good working state, so as to improve work efficiency. The later maintenance of the aluminum alloy hand-cranked hoist is also very important. After using the aluminum alloy hand-cranked hoist, it should be placed in a dry and ventilated place.