B&P Lamp Fat-Boy Paper Insulator For Turn-Knob Socket Paper Insulator for FAT-BOY Turn-Knob Socket Long Paper Insulator for FAT-BOY Turn-Knob Socket to fit FAT-BOY socket interiors FAT-BOY sockets have over-sized bases compared to regular medium-size lamp sockets even though they Fat-Boys are often found on early electric (antique) lamps and fixtures, This one-slot insulator i