Solid brass, antique bronze finish, on/off function, pull chain lamp socket - rated 250W-250V Has UNO threads that will screw onto shade holders or lamp shades that are capable of accepting UNO threads The bottom cap is tapped 1/8IP, which measures 3/8 inch diameter and comes with a set screw making this socket a great option for pendant fixtures These high quality solid brass turn knob UL Listed lamp holders are specifically designed for use in the restoration of antique lamps and fixtures They also serve handsomely in the production of authentically styled reproduction antique lighting B&P Lamp Brass Pull Chain Socket, Antique Bronze Finish, Pull Chain, On/Off Function, Uno Thread Shell - High quality Bronze Pull Chain UL Listed lamp holders are specifically designed for use in the restoration of antique lamps and fixtures. They also serve handsomely in the production of authentically styled reproduction antique lighting.All sockets come with an UNO threaded socket shell.. Features Include: Solid brass antique bronze finish on/off function pull chain lamp socket - rated 250W-250V, Has UNO threads that will screw onto shade holders or lamp shades that are capable of accepting UNO threads, The bottom cap is tapped 1/8IP which measures 3/8 inch diameter and comes with a set screw making this socket a great option for pendant fixtures, These high quality solid brass turn knob UL Listed lamp holders are specifically designed for use in the restoration of antique lamps and fixtures, They also serve handsomely in the production of authentically styled reproduction antique lighting