Hillman Hardware Essentials cold shut for quick, temporary, non-critical repair of chain links or coupling of light attachments. Use 1 size larger than a chain. Ensure rated capacity is greater than the chain. For the grade 30 chain. Zinc plated for durability. Working Load Limit 2,650 lbs. Do not exceed the Working Load Limit. Do not use to hang loads, lift loads, or support weights of persons or objects.