1、Durable Construction: The safety coupler pin is made of durable and reliable stainless steel material, high strength and wear resistant, rust proof and sturdy, having excellent performance. 2、Stable and Firm: The shaft locking pin can firmly fix the coupling device, preventing accidental opening and loss of connection, and effectively ensuring the safety of the vehicle traction process. 3、Easy to Use: Simply insert the pin into the coupling device and locks to complete a strong connection without additional tools, and just unlock and take out the pin to complete the disassembly. 4、Versatile Use: Suitable for various coupling devices, such as trailer hooks, trailer hoses, etc., also can be widely used in different types of vehicles and traction equipment such as cars, trucks and trailers. 5、Ideal Replacement: The trailer wire lock pin is a perfect replacement for repairing, can directly replace the old and broken accessory, easy to use.