This is the latest technology
adopted by the Western Countries, in which the pig tail. i.e. the
copper wires are inserted in the brushes during the process of moulding
itself and then the brushes are sintered in Inert Atmosphere Furnace,
which ensures that the copper wire does not gets oxidized and also
quality of Brushes remain intact. Nowadays almost all The Starter
Motor Manufacturing companies have adopted these types of carbon
brushes.