Two service technicians are discussing the best way to thread a rod. Technician A says they should use a tap and die set. Technician B says they should use a thread repair insert kit. Who is correct?

Both technicians are right, to be able to make a threaded joint you need to use the external thread on one part of the rod using the tap and die set, and on the other side of the rod you need to have an internal thread using the thread repair insert kit