The rolling cutter shell includes first and second ends with {TAIL ~ an annular receiving surface} between {HEAD ~ the ends} 
The rolling cutter shell includes first and second ends with { TAIL ~ an annular receiving surface } between { HEAD ~ the ends }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD