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