Using of the exter cutter alone,
to chamfer bar ends.
Two cutters simultaneously used,
to produce inter-exter chamfers in tubes.
The centering guide allows to locate in the axis
small tubes, handly held.
HSS-E Cobalt = hardness 65 HRC, to machine steels up to 1000 N/mm², cast iron up to 180 HB, copper, brass, bronze, aluminium.