Dutton Lainson Trailer Safety Chain Class 1 24" Day It combines the warmth of 5x52 Italian It combines the warmth of wool with the durability of synthetic fibres The updated Outback 68 Xtralite from Fischer is a definitive cross country ski design for traveling with confidence over miles of untracked snow 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