Pre-Wired Relay Mounting Socket - 3 Pole. The SKT2220 Car Pre-Wired Relay Mounting Socket is an ideal solution for professional vehicle maintenance and repair. With its 3-pole design, this product ensures proper and efficient operation of vehicle electrical systems. The pre-wired feature simplifies and speeds up the installation process. Manufactured from high-quality materials, this relay mounting socket provides long-lasting, reliable performance. Suitable for both DIYers and professionals, this product is an excellent choice for improving the stability and reliability of your vehicle's electrical systems. Its high-quality construction and affordable price make this product an excellent value.