Each type of chain has its intended uses and a maximum weight it can hold before stressing and finally breaking which we’ve charted out for each chain type we have available. However if more detail is needed for a specific type of chain, please contact us here or for a faster response time, call us at 800-927-8549. We offer bulk chain for sale at discounted pricing as well as bulk discounts for most of our other products. Please call us at 800-927-8549 for more information, we'd be happy to help! Chain Materials: Stainless Steel Chains – Strong and highly resistant to rusting Galvanized Steel Chains – For applications requiring corrosion resistance Steel Chains – Generic, high strength chain Brass Chains – Strong, slightly resistant to corrosion and germicidal Chain Grades: Chains are rated and given a “grade” by the National Association of Chain Manufacturers according to their tensile strength. Grade 30 Chain – General purpose chain, not used for overhead lifting Grade 40 Chain – Equal strength to Grade 43, yet smaller in size, not used for overhead lifting Grade 43 Chain – High strength, used for tied owns mainly, not used for overhead lifting Grade 70 Chain – Otherwise known as “Transport Chain” used for tied owns on transportation loads Grade 80 Chain – Made for safety, ideal for overhead lifting or heavy duty towing Grade 100 Chain – Up to 25% stronger than Grade 80 chain, ideal for overhead lifting or heavy duty towing