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