Helps resist complete vehicle-trailer separation during a disconnectFeatures a minimum break force of 11,700 lbs.Chain assembly must meet or exceed gross trailer weightGrade-43 rating for increased tensile strength and abrasion resistanceAssembled with one 5/16" safety latch clevis hook for secure attachmentProtected by a durable zinc-plated finishLimited lifetime warranty (one-year finish, one-year parts)NOTES:Safety chains or cables are required while towing