This 5K Trailer Safety Chain is a Single Length of Safety chain with securing hook for mounting to the tongue of your boat trailer or utility trailer. Having properly functioning safety chains will prevent a bad situation from turning into a disastrous situation. This listing is for a 1 30 inch long, 1/4″ link diameter, Grade 30 Safety Chain with a Single Hook. This chain has a 5,000 lb Breaking force. If you will require two chains simply increase the quantity to meet your desire.