3849b6c8__and_Decker_Drill____GICL_Wiki__Reason_for_Material_Selection
[Part Name] Power Cord [Quantity] 1 [Model Number] 18AWG-2C [Description] Has two springs and is black in color. The cord is 1/4 in thick. [Function] Allows drill to get power from electric sockets. [Material] Cooper, plastic, and steel [Reason for Appearance] It is standard design to fit into electrical socket outlets and is black in color to decrease the appearance of dirt. [Manufacturing Process] Extrusion [Reason for Material Selection] 
IT insulated the inner working of the cord, while also being flexible and a good conductor of electricity.
Difference between revisions of "Group 12 - Black and Decker Drill" - GICL Wiki