Grade 70 Assembly Chain with 2 Hooks, 5/16″x20′, Domestic Grade 70 Assembly Chain is designed for load securement. These chains are made from high-strength, low-alloy carbon steel. They are recognizable by their golden color, which comes from a yellow chromate coating. Commonly used for tie-downs on trailers, but they also find use in towing, logging, safety, and oil rigging applications. About this product: Grade 70 5/16 x 20’ 2 Hooks Domestic