1、Multi Compatibility: The 5/8in pin diameter of this trailer hitch lock is suitable for Class III, IV, V receivers, suitable for a wide range of vehicles including truck, car, boat, meeting the needs of different car model. 2、Secure Protection and Versatile Application: The trailer receiver lock is suitable for hitch rack, cargo hitch tray, bike rack, hitch ball, and tow rope, ensuring reliable connection and security for your trailer, providing peace of mind during your journeys. 3、Anti Theft Design: The trailer hitch receiver pin lock can effectively prevent strangers or thieves from stealing or moving your trailer by locking the vehicle connector, protecting your property security. 4、Easy to Use and Install: Simply insert and lock trailer lock into the receiver, offering convenient and quick installation for securing your trailer during transportation or parking. 5、Sturdy Construction: Made of high strength metal and rubber materials, the trailer lock offers long lasting durability and resistance to wear and tear, providing reliable protection for your trailer and peace of mind during your travels.