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