Dutton Lainson Trailer Safety Chain Class 1 24" Play Attach it to the included Vibram Megagrip Outsole with Attach it to the included drinking pouch traction and braking zones and aggressive lug pattern 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