The geometry of the circumferential ridge or groove can optionally be modified to increase or decrease the amount of force required to effect insertion or removal of {HEAD ~ the ferrule} inside {TAIL ~ the cavity} 
The geometry of the circumferential ridge or groove can optionally be modified to increase or decrease the amount of force required to effect insertion or removal of { HEAD ~ the ferrule } inside { TAIL ~ the cavity }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL