Ring screw to ensure that the card is properly locked. When lifting clasp screw rotation can not use this type of clasp. Not allow the clasp outward side when lifting. Clasp rod should be hung on the hook, metal washer fixed clasp position.

Ensure that ring screw completely locked. If loading time could lead to ring screw you cannot use this type ring. Do not let ring when loading externally-oriented side. Par ring should be hanging on the hook, you can use metal washers fixed card central location.

Guarantees the clamp screw rod to lock completely.If time hoisting possibly causes the clamp screw rod rotation not to be able to use this type clamp.When hoisting cannot let one side the clamp extroversion.The card eye-balt should hang on the lift hook, may use the metallic packing ring fixed clamp

Ensure clasp screw is fully locked. If lifting could cause card ring screw turning the ring type card cannot be used. Lifting must not let the clasp outward. Should be hanging on the hook clasp can be fixed using metal washers clasp position.

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