Packing list: 4 pieces M1*16mm long cotton pins, 4 pieces M1.5*30mm long cotton pins, 4 pieces M2*40mm long cotton pins, 4 pieces M2.5*50mm long cotton pins, 4 pieces M3 *65mm long cotton pin Quality: These high quality trailer hitch pins are galvanized for durability.The manufacturing process ensures long life so replacement is not necessary. Design: These R-shaped clips feature a hairpin design that locks bolts quickly, securely, and effectively, preventing relative rotation and making them durable. Material: Heavy-duty galvanized steel for durability and corrosion resistance, while the hairpin style design ensures fast and secure fastening of the bolt for greater stability. VERSATILITYSpecialized lock ensures a tight fit and long-lasting hold, and comes with keys that can open four types of locks.Works on tractors, farm equipment, trucks, cars, campers, lawn and garden equipment.wait.