specifications of the lifting hook, and the product shall have the quality qualification certificate of the manufacturer, otherwise it is not allowed to be used.2, the new hook should do a load test, the measurement hook opening should not exceed 0.25% of the original opening.3. Check whether the hook is cracked or seriously deformed, corroded or worn frequently during use.4. The hook shall be tested once a year.During the test, the static test was carried out at 1.25 times the allowable working