Dutton Lainson Trailer Safety Chain Class 1 24" Showers The Blacktail series of tents Size:5 amp" The Blacktail series of tents offers spacious sleeping areas with easy access through two Environmentally preferred premium leather from LWG certified tannery Heavy duty Class 1 welded link chains for trailers up to 2000 lbs Zinc plated finish to resist rust with heavy steel hook and safety clip that latches to keep chains attached to tow vehicle Features a chain size of 3 16 and mounts with 3 8 bolts This product meets SAE and V 5 standards Two 24 chains are included per package NOTE Do not mount chains to trailer tongue with the same bolts used to mount the coupler Cross safety chains under coupling allowing only enough slack for turns