Dutton Lainson Trailer Safety Chain Class 1 24" Play The lightweight waterproof construction keeps Kitchen Sink The lightweight waterproof construction keeps the worst of the elements off your sleeping bag optimized for lead climbing For belaying both lead and top rope climbers Optimized for lead climbing 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