To make an electrical connection, stripped lamp wires are simply inserted into small holes in the side of the plug and the supplied pins pushed in from the front. Since the plug is not permanently attached to the wires, it may be reused time and time. The plug is made of hard, white plastic and extends less than .25" when plugged in. Assembly instructions are included. 600 ma current rating and made to work with Cir-Kit Wall Outlet.