Before lifting an object, use the lifting chain to estimate the weight of the object, and don't overload it. Before use, the hook, chain and brake parts must be carefully checked and confirmed to be in good condition before use. Before lifting, check whether the upper and lower hooks are hung firmly and shall not be twisted. The chain hoist shall be suspended vertically and shall not be twisted. After all the above inspections are confirmed, the operator stands on the same horizontal plane of the hand zipper wheel and pulls the hand zipper strip to make the hand zipper wheel rotate clockwise, so that the weight can rise.

Inverted chain generally refers to inverted chain. Chain block, also known as fairy hoist, chain hoist, chain hoist and manual hoist, is a kind of manual hoisting machinery with simple use and convenient handling, also known as chain hoist or chain block.