1、Firm and Reliable: All terminals in the trailer 7 pin plug are firmly secured in place with screw stress relief clamps that prevent the trailer wire from pulling out of the connector, providing a reliable connection. 2、Convenient and Practical: This 7 pin trailer wiring plug provides a secure connection between your trailer and tractor, and it can be spliced into your existing trailer wiring at any time to connect taillights, brake lights, reverse lights, turn signals, trailer brakes, and auxiliary power. 3、Durable Construction: The 7 pin trailer plug connector is made of plastic for long term use and the copper terminal ensures perfect electrical conductivity. 4、Easy Installation: This trailer plug connector has a quick and easy installation without any extra tools or professional help needed, can be a perfect DIY solution for trailers. 5、Versatile Application: The trailer round wiring plug is designed to fit most vehicle, RV, sedan and boat. Compatible with both 12V and 24V, offering a versatile solution for all your trailer fitting needs.