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