Grade 43 chain provide a high strength chain that can be used as a Tie Down in the trucking, towing and logging industries. Medium high-test carbon steel with a silver chromate finish. Exhibits good wear characteristic. 100% proof tested to 2X WLL rating. Made to NACM standards per specifications of the department of transportation and CCMTA for Tie Down use with properly marked links. All clevis hooks are made of heat-treated alloy steel.