The Koch Industries Grade 30 Proof Coil Chain is designed for general purpose chain, used for tail gates, trailer chains, etc.
- Grade 30 chain is a low-carbon steel and an economical general purpose chain also known as "Proof Coil Chain"
- Electrogalvanized finish
- Grade 30 chain can be used in applications which do not require a high strength to weight ratio
- Chain links are welded