{TAIL ~ The spring} is biased to require sufficient force to insert or remove {HEAD ~ the ferrule} 
{ TAIL ~ The spring } is biased to require sufficient force to insert or remove { HEAD ~ the ferrule }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD