{HEAD ~ This slanted or chamfered surface} provides {TAIL ~ easy assembly} of stem 8 within hollow shaft 60 and engagement of spring clip 50 with slit 61 
provides
{ HEAD ~ This slanted or chamfered surface } provides { TAIL ~ easy assembly } of stem 8 within hollow shaft 60 and engagement of spring clip 50 with slit 61
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH