The aluminum alloy hand -pulling the gourd cannot be used overloaded, it is a lifting tool. We know that the safety coefficient of aluminum alloy hand -to -hand gourd is 1.25 times. However, it must be used in accordance with the standard load when used. Overloading will not only damage the chain, but also cause damage to the internal gear. The overload is not safe. After use, keep clean, and muddy foreign body should be cleaned in time. Put in a ventilated place. It is necessary to ensure regularly to ensure good jobs of aluminum alloy hands.