The item is 3/8" x 35" Grade 70 trailer safety chains with forged hook.It is made by zinc plated alloy steel to prevent rust Grade 70 Used for trailer.The purpose of Safety Chain is to retain connection between the towing vehicle and trailer in the event of separation of the trailer coupling from the ball or the ball from the hitch, long enough to bring the vehicles to a stop. Our Company Promise We are devoted to a complete line of products using cutting edge technology with the expertise and ingenuity to produce superior products that are durable and dependable . We always develop and apply the newest advancements in technology to provide customers with quality products without the high price.