Class ll 36" L x 3/16" D 3500 lb Zinc-Plated Steel Welded Link Safety Chain with Safety Hook by Dutton LainsonA(R). This superior product is perfect to make your trailer towing experience safe and convenient. Designed to meet the highest quality standards, it is 2nd to none in durability and performance. Made using the finest materials, it is sure to serve you reliably for a long time. Features Dutton LainsonA(R) trailer safety chains Heavy duty Class 2 welded link chains for trailers up to 3500 lb Mount with 7/16" bolts Zinc plated finish to resist rust Heavy steel hook and safety clip latches to keep chains attached to tow vehicle Meets SAE and V-5 standards.