Also known as Proof Coil chain, Grade 30 chain is typically used as a swing set chain, tow chain, or logging chain. Grade 30 is the lowest grade of carbon chain.
Also known as High Test chain, Grade 43 chain is typically used as a load binding chain, tow chain, or logging chain. Grade 43 is your mid-grade carbon chain.
Also known as Transport Chain, Grade 70 chain is typically used for load binding, towing, or logging. Grade 70 is the strongest carbon chain.
Grade 80 Alloy chain is used for lifting, can be made into slings for overhead lifting and carries a design factor of 4:1.