Calcutta Kettle Cove Sunglasses Camp Cookware & Accessories Heavy duty Class 1 welded flat top with multi 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 9 stainless steel HPCR bearings + 1 roller bearing Authentic Calcutta logo Integrated hinge will stand up to repeated use