{HEAD ~ A core pin tip} is made of {TAIL ~ drawn wire} or is separately replaceable on the core pin 
is made of
{ HEAD ~ A core pin tip } is made of { TAIL ~ drawn wire } or is separately replaceable on the core pin
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH