2-circuit socket. Includes a third terminal to control a separate socket. Brass turn-knob socket for lamps with light in base and top. Ideal to replace worn or broken sockets in light fixtures. Threaded 1/8 IP medium base. Rated for 250 watts/250 volts. UL (Underwriter's Laboratories) listed. WARNING: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. -