This Pull-Chain Socket is perfect for antique restorations and vintage fixtures. Common for table and floor lamps, the pull chain socket contains a chain on the side for on/off function of the lamp. Chains can vary in length and design to match the lamp. Also, the medium base allows for a 1/8 IPS threading (the standard for most applications), and can withstand a maximum of 660 watts or 250 volts. So, whether your building or repairing lamps, this Brass Light Socket will help maintain that vintage appearance.