Firm and Reliable: All terminals in the 7 pin trailer plug are securely held in place with screw stress relief clamps that prevent the trailer wire from pulling out of the connector, ensuring a stable and dependable connection. Convenient and Practical: This 7 pin trailer wiring plug creates a secure link between your trailer and towing vehicle, and can be easily spliced into existing trailer wiring to connect taillights, brake lights, reverse lights, turn signals, trailer brakes, and auxiliary power. Durable Construction: The 7 pin trailer plug is constructed with durable plastic for long-lasting performance, and features copper terminals for excellent electrical conductivity. Easy Installation: Designed for quick and simple installation without the need for special tools or professional assistance, this trailer plug is an ideal DIY solution. Versatile Application: The round 7 pin wiring plug is compatible with a wide range of vehicles, including RVs, cars, and boats. Works with both 12V and 24V systems, providing a flexible solution for various trailer electrical needs.