Inverted chain refers to the hand -stracting gourd. It is a mechanical and equipment used for heavy objects, with a variety of specifications and models. Different tonnage stubs are suitable for different lifting work. There are also many options for the chain length of the hand pour, such as 1.5m, 2m, 3m, 5m, etc. The chain length determines the lifting height. 15 tons, 20 tons, etc. to meet the needs of different working occasions. Suitable for use in a powerless environment.