1. The belt must be a whole one
2. Soft materials shall be padded on the waist part of the belt
3. All hanging ropes used by welders must be sleeved, other hanging ropes only need to be sleeved, and the hanging ropes need to be sleeved; strand ropes are not allowed to be loose
4. The metal hook must have a safety device, which can be opened and closed freely for more than 10000 times
5. The surface of metal fittings shall be smooth and free of pits and cracks, and rust proof treatment shall be conducted; the whole piece shall be free of welding.